1625993856 has 96 divisors (see below), whose sum is σ = 4925294400. Its totient is φ = 513464832.

The previous prime is 1625993851. The next prime is 1625993869. The reversal of 1625993856 is 6583995261.

It is a happy number.

1625993856 is a `hidden beast` number, since 1 + 6 + 259 + 9 + 385 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (1625993851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15256 + ... + 59031.

It is an arithmetic number, because the mean of its divisors is an integer number (51305150).

Almost surely, 2^1625993856 is an apocalyptic number.

1625993856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1625993856 is an abundant number, since it is smaller than the sum of its proper divisors (3299300544).

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

1625993856 is a wasteful number, since it uses less digits than its factorization.

1625993856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74326 (or 74311 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The square root of 1625993856 is about 40323.6141237365. The cubic root of 1625993856 is about 1175.9069758432.

The spelling of 1625993856 in words is "one billion, six hundred twenty-five million, nine hundred ninety-three thousand, eight hundred fifty-six".