61738927931 has 16 divisors (see below), whose sum is σ = 65786904000. Its totient is φ = 57737991168.

The previous prime is 61738927919. The next prime is 61738927937. The reversal of 61738927931 is 13972983716.

It is a cyclic number.

It is not a de Polignac number, because 61738927931 - 2¹⁸ = 61738665787 is a prime.

It is a super-2 number, since 2×61738927931² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61738927937) 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, 2603255 + ... + 2626863.

It is an arithmetic number, because the mean of its divisors is an integer number (4111681500).

Almost surely, 2^61738927931 is an apocalyptic number.

61738927931 is a deficient number, since it is larger than the sum of its proper divisors (4047976069).

61738927931 is a wasteful number, since it uses less digits than its factorization.

61738927931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24598.

The product of its digits is 3429216, while the sum is 56.

The spelling of 61738927931 in words is "sixty-one billion, seven hundred thirty-eight million, nine hundred twenty-seven thousand, nine hundred thirty-one".