1625261920 has 24 divisors (see below), whose sum is σ = 3839681664. Its totient is φ = 650104704.

The previous prime is 1625261899. The next prime is 1625261933. The reversal of 1625261920 is 291625261.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5078784 + ... + 5079103.

It is an arithmetic number, because the mean of its divisors is an integer number (159986736).

Almost surely, 2^1625261920 is an apocalyptic number.

1625261920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1625261920 is an abundant number, since it is smaller than the sum of its proper divisors (2214419744).

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

1625261920 is a wasteful number, since it uses less digits than its factorization.

1625261920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10157902 (or 10157894 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1625261920 is about 40314.5373283633. The cubic root of 1625261920 is about 1175.7305057574.

The spelling of 1625261920 in words is "one billion, six hundred twenty-five million, two hundred sixty-one thousand, nine hundred twenty".