625161104020 has 96 divisors (see below), whose sum is σ = 1343439141408. Its totient is φ = 244310556672.

The previous prime is 625161104003. The next prime is 625161104033. The reversal of 625161104020 is 20401161526.

It can be written as a sum of positive squares in 16 ways, for example, as 251600553604 + 373560550416 = 501598^2 + 611196^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 625161104020.

It is a congruent number.

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, 77243094 + ... + 77251186.

It is an arithmetic number, because the mean of its divisors is an integer number (13994157723).

Almost surely, 2^625161104020 is an apocalyptic number.

It is an amenable number.

625161104020 is an abundant number, since it is smaller than the sum of its proper divisors (718278037388).

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

625161104020 is a wasteful number, since it uses less digits than its factorization.

625161104020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8669 (or 8667 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 625161104020 its reverse (20401161526), we get a palindrome (645562265546).

The spelling of 625161104020 in words is "six hundred twenty-five billion, one hundred sixty-one million, one hundred four thousand, twenty".