61371284931 has 32 divisors (see below), whose sum is σ = 99213177600. Its totient is φ = 37184495040.

The previous prime is 61371284929. The next prime is 61371284963. The reversal of 61371284931 is 13948217316.

61371284931 is a `hidden beast` number, since 6 + 1 + 37 + 128 + 493 + 1 = 666.

61371284931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61371284931 - 2¹ = 61371284929 is a prime.

It is a super-2 number, since 2×61371284931² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61371284971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1133935 + ... + 1186823.

It is an arithmetic number, because the mean of its divisors is an integer number (3100411800).

Almost surely, 2^61371284931 is an apocalyptic number.

61371284931 is a deficient number, since it is larger than the sum of its proper divisors (37841892669).

61371284931 is a wasteful number, since it uses less digits than its factorization.

61371284931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56816 (or 56810 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 61371284931 in words is "sixty-one billion, three hundred seventy-one million, two hundred eighty-four thousand, nine hundred thirty-one".