61961464872 has 48 divisors (see below), whose sum is σ = 167833984500. Its totient is φ = 20651152896.

The previous prime is 61961464853. The next prime is 61961464913. The reversal of 61961464872 is 27846416916.

61961464872 is a `hidden beast` number, since 6 + 19 + 6 + 146 + 487 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 61729390116 + 232074756 = 248454^2 + 15234^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 551154 + ... + 653982.

Almost surely, 2^61961464872 is an apocalyptic number.

It is an amenable number.

61961464872 is an abundant number, since it is smaller than the sum of its proper divisors (105872519628).

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

61961464872 is a wasteful number, since it uses less digits than its factorization.

61961464872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111210 (or 111203 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

It can be divided in two parts, 619614 and 64872, that added together give a palindrome (684486).

The spelling of 61961464872 in words is "sixty-one billion, nine hundred sixty-one million, four hundred sixty-four thousand, eight hundred seventy-two".