1626320825 has 12 divisors (see below), whose sum is σ = 2017214268. Its totient is φ = 1300684800.

The previous prime is 1626320807. The next prime is 1626320831. The reversal of 1626320825 is 5280236261.

It can be written as a sum of positive squares in 6 ways, for example, as 61089856 + 1565230969 = 7816^2 + 39563^2 .

It is not a de Polignac number, because 1626320825 - 2⁸ = 1626320569 is a prime.

It is a Duffinian 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, 109865 + ... + 123785.

It is an arithmetic number, because the mean of its divisors is an integer number (168101189).

Almost surely, 2^1626320825 is an apocalyptic number.

It is an amenable number.

1626320825 is a deficient number, since it is larger than the sum of its proper divisors (390893443).

1626320825 is a wasteful number, since it uses less digits than its factorization.

1626320825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18604 (or 18599 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 1626320825 is about 40327.6682316248. The cubic root of 1626320825 is about 1175.9857910978.

The spelling of 1626320825 in words is "one billion, six hundred twenty-six million, three hundred twenty thousand, eight hundred twenty-five".