1625665560 has 64 divisors (see below), whose sum is σ = 4879720800. Its totient is φ = 433268736.

The previous prime is 1625665541. The next prime is 1625665597. The reversal of 1625665560 is 655665261.

It is a super-2 number, since 2×1625665560² = 5285577025940227200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346752 + ... + 351408.

Almost surely, 2^1625665560 is an apocalyptic number.

1625665560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1625665560 is an abundant number, since it is smaller than the sum of its proper divisors (3254055240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1625665560 is a wasteful number, since it uses less digits than its factorization.

1625665560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7580 (or 7576 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 42.

The square root of 1625665560 is about 40319.5431521737. The cubic root of 1625665560 is about 1175.8278300868.

The spelling of 1625665560 in words is "one billion, six hundred twenty-five million, six hundred sixty-five thousand, five hundred sixty".