61897272474 has 32 divisors (see below), whose sum is σ = 129260214720. Its totient is φ = 19734778112.

The previous prime is 61897272473. The next prime is 61897272487. The reversal of 61897272474 is 47427279816.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61897272473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1643679 + ... + 1680914.

It is an arithmetic number, because the mean of its divisors is an integer number (4039381710).

Almost surely, 2^61897272474 is an apocalyptic number.

61897272474 is an abundant number, since it is smaller than the sum of its proper divisors (67362942246).

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

61897272474 is a wasteful number, since it uses less digits than its factorization.

61897272474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3324734.

The product of its digits is 9483264, while the sum is 57.

The spelling of 61897272474 in words is "sixty-one billion, eight hundred ninety-seven million, two hundred seventy-two thousand, four hundred seventy-four".