625009506 has 32 divisors (see below), whose sum is σ = 1368880128. Its totient is φ = 188671440.

The previous prime is 625009499. The next prime is 625009519. The reversal of 625009506 is 605900526.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 646 + ... + 35361.

It is an arithmetic number, because the mean of its divisors is an integer number (42777504).

Almost surely, 2^625009506 is an apocalyptic number.

625009506 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

625009506 is an abundant number, since it is smaller than the sum of its proper divisors (743870622).

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

625009506 is a wasteful number, since it uses less digits than its factorization.

625009506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36286.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 625009506 is about 25000.1901192771. The cubic root of 625009506 is about 854.9923079914.

The spelling of 625009506 in words is "six hundred twenty-five million, nine thousand, five hundred six".