1045645653 has 16 divisors (see below), whose sum is σ = 1502350976. Its totient is φ = 643083840.

The previous prime is 1045645651. The next prime is 1045645661. The reversal of 1045645653 is 3565465401.

It is not a de Polignac number, because 1045645653 - 2¹ = 1045645651 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045645651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65376 + ... + 79782.

It is an arithmetic number, because the mean of its divisors is an integer number (93896936).

Almost surely, 2^1045645653 is an apocalyptic number.

1045645653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1045645653 is a deficient number, since it is larger than the sum of its proper divisors (456705323).

1045645653 is a wasteful number, since it uses less digits than its factorization.

1045645653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16284.

The product of its (nonzero) digits is 216000, while the sum is 39.

The square root of 1045645653 is about 32336.4446561461. Note that the first 3 decimals coincide. The cubic root of 1045645653 is about 1014.9894125583.

The spelling of 1045645653 in words is "one billion, forty-five million, six hundred forty-five thousand, six hundred fifty-three".