625196991820 has 12 divisors (see below), whose sum is σ = 1312913682864. Its totient is φ = 250078796720.

The previous prime is 625196991817. The next prime is 625196991883. The reversal of 625196991820 is 28199691526.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15629924776 + ... + 15629924815.

It is an arithmetic number, because the mean of its divisors is an integer number (109409473572).

Almost surely, 2^625196991820 is an apocalyptic number.

It is an amenable number.

625196991820 is an abundant number, since it is smaller than the sum of its proper divisors (687716691044).

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

625196991820 is a wasteful number, since it uses less digits than its factorization.

625196991820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31259849600 (or 31259849598 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 58.

The spelling of 625196991820 in words is "six hundred twenty-five billion, one hundred ninety-six million, nine hundred ninety-one thousand, eight hundred twenty".