1625624980 has 36 divisors (see below), whose sum is σ = 3971171988. Its totient is φ = 557356800.

The previous prime is 1625624977. The next prime is 1625625011. The reversal of 1625624980 is 894265261.

It can be written as a sum of positive squares in 2 ways, for example, as 1107425284 + 518199696 = 33278^2 + 22764^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 828421 + ... + 830380.

It is an arithmetic number, because the mean of its divisors is an integer number (110310333).

Almost surely, 2^1625624980 is an apocalyptic number.

1625624980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1625624980 is an abundant number, since it is smaller than the sum of its proper divisors (2345547008).

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

1625624980 is a wasteful number, since it uses less digits than its factorization.

1625624980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658824 (or 1658815 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 1625624980 is about 40319.0399191251. The cubic root of 1625624980 is about 1175.8180463011.

The spelling of 1625624980 in words is "one billion, six hundred twenty-five million, six hundred twenty-four thousand, nine hundred eighty".