61351792172 has 24 divisors (see below), whose sum is σ = 117246854592. Its totient is φ = 27858438800.

The previous prime is 61351792153. The next prime is 61351792181. The reversal of 61351792172 is 27129715316.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675278 + ... + 760725.

It is an arithmetic number, because the mean of its divisors is an integer number (4885285608).

Almost surely, 2^61351792172 is an apocalyptic number.

It is an amenable number.

61351792172 is a deficient number, since it is larger than the sum of its proper divisors (55895062420).

61351792172 is a wasteful number, since it uses less digits than its factorization.

61351792172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436989 (or 1436987 counting only the distinct ones).

The product of its digits is 158760, while the sum is 44.

The spelling of 61351792172 in words is "sixty-one billion, three hundred fifty-one million, seven hundred ninety-two thousand, one hundred seventy-two".