61121605172 has 12 divisors (see below), whose sum is σ = 112592430720. Its totient is φ = 28952339256.

The previous prime is 61121605169. The next prime is 61121605183. The reversal of 61121605172 is 27150612116.

61121605172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 402115748 + ... + 402115899.

It is an arithmetic number, because the mean of its divisors is an integer number (9382702560).

Almost surely, 2^61121605172 is an apocalyptic number.

It is an amenable number.

61121605172 is a deficient number, since it is larger than the sum of its proper divisors (51470825548).

61121605172 is a wasteful number, since it uses less digits than its factorization.

61121605172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804231670 (or 804231668 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 61121605172 in words is "sixty-one billion, one hundred twenty-one million, six hundred five thousand, one hundred seventy-two".