61087007979 has 32 divisors (see below), whose sum is σ = 94143168000. Its totient is φ = 39100616352.

The previous prime is 61087007963. The next prime is 61087008007. The reversal of 61087007979 is 97970078016.

61087007979 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 61087007979 - 2⁴ = 61087007963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61087007879) 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, 77767 + ... + 358080.

It is an arithmetic number, because the mean of its divisors is an integer number (2941974000).

Almost surely, 2^61087007979 is an apocalyptic number.

61087007979 is a deficient number, since it is larger than the sum of its proper divisors (33056160021).

61087007979 is a wasteful number, since it uses less digits than its factorization.

61087007979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436064 (or 436058 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 54.

The spelling of 61087007979 in words is "sixty-one billion, eighty-seven million, seven thousand, nine hundred seventy-nine".