621121169156 has 12 divisors (see below), whose sum is σ = 1086967848540. Its totient is φ = 310558926720.

The previous prime is 621121169143. The next prime is 621121169161. The reversal of 621121169156 is 651961121126.

It can be written as a sum of positive squares in 2 ways, for example, as 594851242756 + 26269926400 = 771266^2 + 162080^2 .

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, 872576 + ... + 1415496.

It is an arithmetic number, because the mean of its divisors is an integer number (90580654045).

Almost surely, 2^621121169156 is an apocalyptic number.

It is an amenable number.

621121169156 is a deficient number, since it is larger than the sum of its proper divisors (465846679384).

621121169156 is a wasteful number, since it uses less digits than its factorization.

621121169156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828934 (or 828932 counting only the distinct ones).

The product of its digits is 38880, while the sum is 41.

The spelling of 621121169156 in words is "six hundred twenty-one billion, one hundred twenty-one million, one hundred sixty-nine thousand, one hundred fifty-six".