625550136 has 64 divisors (see below), whose sum is σ = 1635033600. Its totient is φ = 199064448.

The previous prime is 625550089. The next prime is 625550143. The reversal of 625550136 is 631055526.

It is a junction number, because it is equal to n+sod(n) for n = 625550097 and 625550106.

It is a congruent number.

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, 456925 + ... + 458291.

It is an arithmetic number, because the mean of its divisors is an integer number (25547400).

Almost surely, 2^625550136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 625550136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (817516800).

625550136 is an abundant number, since it is smaller than the sum of its proper divisors (1009483464).

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

625550136 is a wasteful number, since it uses less digits than its factorization.

625550136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228 (or 2224 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 625550136 is about 25011.0002998681. Note that the first 3 decimals coincide. The cubic root of 625550136 is about 855.2387582583.

The spelling of 625550136 in words is "six hundred twenty-five million, five hundred fifty thousand, one hundred thirty-six".