1625455120 has 20 divisors (see below), whose sum is σ = 3779183340. Its totient is φ = 650182016.

The previous prime is 1625455109. The next prime is 1625455159. The reversal of 1625455120 is 215545261.

It can be written as a sum of positive squares in 2 ways, for example, as 1154912256 + 470542864 = 33984^2 + 21692^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 10159015 + ... + 10159174.

It is an arithmetic number, because the mean of its divisors is an integer number (188959167).

Almost surely, 2^1625455120 is an apocalyptic number.

1625455120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1625455120 is an abundant number, since it is smaller than the sum of its proper divisors (2153728220).

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

1625455120 is a wasteful number, since it uses less digits than its factorization.

1625455120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20318202 (or 20318196 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 1625455120 is about 40316.9334151297. The cubic root of 1625455120 is about 1175.7770915068. Note that the first 3 decimals are identical.

The spelling of 1625455120 in words is "one billion, six hundred twenty-five million, four hundred fifty-five thousand, one hundred twenty".