1645500656 has 20 divisors (see below), whose sum is σ = 3191195304. Its totient is φ = 821966400.

The previous prime is 1645500653. The next prime is 1645500679. The reversal of 1645500656 is 6560055461.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645500653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31490 + ... + 65441.

Almost surely, 2^1645500656 is an apocalyptic number.

1645500656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1645500656 is a deficient number, since it is larger than the sum of its proper divisors (1545694648).

1645500656 is a wasteful number, since it uses less digits than its factorization.

1645500656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98000 (or 97994 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 1645500656 is about 40564.7711197783. The cubic root of 1645500656 is about 1180.5906876964.

The spelling of 1645500656 in words is "one billion, six hundred forty-five million, five hundred thousand, six hundred fifty-six".