61330579557 has 32 divisors (see below), whose sum is σ = 89544268800. Its totient is φ = 37108177920.

The previous prime is 61330579537. The next prime is 61330579573. The reversal of 61330579557 is 75597503316.

It is not a de Polignac number, because 61330579557 - 2³⁰ = 60256837733 is a prime.

It is a super-2 number, since 2×61330579557² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61330579507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9629388 + ... + 9635754.

It is an arithmetic number, because the mean of its divisors is an integer number (2798258400).

Almost surely, 2^61330579557 is an apocalyptic number.

It is an amenable number.

61330579557 is a deficient number, since it is larger than the sum of its proper divisors (28213689243).

61330579557 is a wasteful number, since it uses less digits than its factorization.

61330579557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10493.

The product of its (nonzero) digits is 2976750, while the sum is 51.

The spelling of 61330579557 in words is "sixty-one billion, three hundred thirty million, five hundred seventy-nine thousand, five hundred fifty-seven".