1653705945 has 48 divisors (see below), whose sum is σ = 3037507200. Its totient is φ = 829958400.

The previous prime is 1653705929. The next prime is 1653705953. The reversal of 1653705945 is 5495073561.

1653705945 is a `hidden beast` number, since 1 + 6 + 53 + 7 + 0 + 594 + 5 = 666.

It is not a de Polignac number, because 1653705945 - 2⁴ = 1653705929 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 1653705945.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 122701 + ... + 135509.

It is an arithmetic number, because the mean of its divisors is an integer number (63281400).

Almost surely, 2^1653705945 is an apocalyptic number.

1653705945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1653705945 is a deficient number, since it is larger than the sum of its proper divisors (1383801255).

1653705945 is a wasteful number, since it uses less digits than its factorization.

1653705945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12990 (or 12987 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 45.

The square root of 1653705945 is about 40665.7834671853. The cubic root of 1653705945 is about 1182.5497734518.

The spelling of 1653705945 in words is "one billion, six hundred fifty-three million, seven hundred five thousand, nine hundred forty-five".