1046645865 has 24 divisors (see below), whose sum is σ = 1816593480. Its totient is φ = 557470464.

The previous prime is 1046645849. The next prime is 1046645879. The reversal of 1046645865 is 5685466401.

1046645865 is a `hidden beast` number, since 1 + 0 + 4 + 6 + 64 + 586 + 5 = 666.

1046645865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2903616 + 1043742249 = 1704^2 + 32307^2 .

It is not a de Polignac number, because 1046645865 - 2⁴ = 1046645849 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1046645865.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19741 + ... + 49829.

It is an arithmetic number, because the mean of its divisors is an integer number (75691395).

Almost surely, 2^1046645865 is an apocalyptic number.

1046645865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1046645865 is a deficient number, since it is larger than the sum of its proper divisors (769947615).

1046645865 is a wasteful number, since it uses less digits than its factorization.

1046645865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30873 (or 30870 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The square root of 1046645865 is about 32351.9066671502. The cubic root of 1046645865 is about 1015.3129386851.

The spelling of 1046645865 in words is "one billion, forty-six million, six hundred forty-five thousand, eight hundred sixty-five".