1625715385 has 32 divisors (see below), whose sum is σ = 2300832000. Its totient is φ = 1102147200.

The previous prime is 1625715359. The next prime is 1625715401. The reversal of 1625715385 is 5835175261.

It is a happy number.

It is not a de Polignac number, because 1625715385 - 2⁷ = 1625715257 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147310 + ... + 157960.

It is an arithmetic number, because the mean of its divisors is an integer number (71901000).

Almost surely, 2^1625715385 is an apocalyptic number.

It is an amenable number.

1625715385 is a deficient number, since it is larger than the sum of its proper divisors (675116615).

1625715385 is an equidigital number, since it uses as much as digits as its factorization.

1625715385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10766 (or 10752 counting only the distinct ones).

The product of its digits is 252000, while the sum is 43.

The square root of 1625715385 is about 40320.1610239840. The cubic root of 1625715385 is about 1175.8398426074.

The spelling of 1625715385 in words is "one billion, six hundred twenty-five million, seven hundred fifteen thousand, three hundred eighty-five".