1625640016 has 80 divisors (see below), whose sum is σ = 4228979328. Its totient is φ = 584640000.

The previous prime is 1625640001. The next prime is 1625640041. The reversal of 1625640016 is 6100465261.

It is a self number, because there is not a number n which added to its sum of digits gives 1625640016.

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, 34735 + ... + 66766.

Almost surely, 2^1625640016 is an apocalyptic number.

1625640016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1625640016 is an abundant number, since it is smaller than the sum of its proper divisors (2603339312).

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

1625640016 is a wasteful number, since it uses less digits than its factorization.

1625640016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101540 (or 101534 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1625640016 is about 40319.2263814672. The cubic root of 1625640016 is about 1175.8216714803.

The spelling of 1625640016 in words is "one billion, six hundred twenty-five million, six hundred forty thousand, sixteen".