61014771940 has 12 divisors (see below), whose sum is σ = 128131021116. Its totient is φ = 24405908768.

The previous prime is 61014771913. The next prime is 61014771941. The reversal of 61014771940 is 4917741016.

It can be written as a sum of positive squares in 2 ways, for example, as 7457704164 + 53557067776 = 86358^2 + 231424^2 .

It is a super-2 number, since 2×61014771940² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61014771893 and 61014771902.

It is not an unprimeable number, because it can be changed into a prime (61014771941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1525369279 + ... + 1525369318.

It is an arithmetic number, because the mean of its divisors is an integer number (10677585093).

Almost surely, 2^61014771940 is an apocalyptic number.

It is an amenable number.

61014771940 is an abundant number, since it is smaller than the sum of its proper divisors (67116249176).

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

61014771940 is a wasteful number, since it uses less digits than its factorization.

61014771940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3050738606 (or 3050738604 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 40.

The spelling of 61014771940 in words is "sixty-one billion, fourteen million, seven hundred seventy-one thousand, nine hundred forty".