1625151664 has 40 divisors (see below), whose sum is σ = 3298047840. Its totient is φ = 774309888.

The previous prime is 1625151617. The next prime is 1625151701. The reversal of 1625151664 is 4661515261.

It is a super-2 number, since 2×1625151664² = 5282235862003937792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90784 + ... + 107200.

It is an arithmetic number, because the mean of its divisors is an integer number (82451196).

Almost surely, 2^1625151664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1625151664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1649023920).

1625151664 is an abundant number, since it is smaller than the sum of its proper divisors (1672896176).

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

1625151664 is a wasteful number, since it uses less digits than its factorization.

1625151664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16717 (or 16711 counting only the distinct ones).

The product of its digits is 43200, while the sum is 37.

The square root of 1625151664 is about 40313.1698580005. The cubic root of 1625151664 is about 1175.7039183968.

The spelling of 1625151664 in words is "one billion, six hundred twenty-five million, one hundred fifty-one thousand, six hundred sixty-four".