625542554436 has 12 divisors (see below), whose sum is σ = 1459599293712. Its totient is φ = 208514184808.

The previous prime is 625542554411. The next prime is 625542554473. The reversal of 625542554436 is 634455245526.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26064273090 + ... + 26064273113.

It is an arithmetic number, because the mean of its divisors is an integer number (121633274476).

Almost surely, 2^625542554436 is an apocalyptic number.

It is an amenable number.

625542554436 is an abundant number, since it is smaller than the sum of its proper divisors (834056739276).

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

625542554436 is a wasteful number, since it uses less digits than its factorization.

625542554436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52128546210 (or 52128546208 counting only the distinct ones).

The product of its digits is 17280000, while the sum is 51.

The spelling of 625542554436 in words is "six hundred twenty-five billion, five hundred forty-two million, five hundred fifty-four thousand, four hundred thirty-six".