1625020656 has 80 divisors (see below), whose sum is σ = 5006298624. Its totient is φ = 444102912.

The previous prime is 1625020643. The next prime is 1625020669. The reversal of 1625020656 is 6560205261.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1625020643) and next prime (1625020669).

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, 97411 + ... + 112866.

Almost surely, 2^1625020656 is an apocalyptic number.

1625020656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1625020656 is an abundant number, since it is smaller than the sum of its proper divisors (3381277968).

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

1625020656 is a wasteful number, since it uses less digits than its factorization.

1625020656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210318 (or 210312 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 1625020656 is about 40311.5449468263. The cubic root of 1625020656 is about 1175.6723252925.

The spelling of 1625020656 in words is "one billion, six hundred twenty-five million, twenty thousand, six hundred fifty-six".