61917944924 has 24 divisors (see below), whose sum is σ = 118213940208. Its totient is φ = 28142864640.

The previous prime is 61917944917. The next prime is 61917944929. The reversal of 61917944924 is 42944971916.

It is a super-2 number, since 2×61917944924² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61917944924.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61917944929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1021844 + ... + 1080740.

It is an arithmetic number, because the mean of its divisors is an integer number (4925580842).

Almost surely, 2^61917944924 is an apocalyptic number.

It is an amenable number.

61917944924 is a deficient number, since it is larger than the sum of its proper divisors (56295995284).

61917944924 is a wasteful number, since it uses less digits than its factorization.

61917944924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82805 (or 82803 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 56.

The spelling of 61917944924 in words is "sixty-one billion, nine hundred seventeen million, nine hundred forty-four thousand, nine hundred twenty-four".