61579697516 has 48 divisors (see below), whose sum is σ = 115236172800. Its totient is φ = 28691970048.

The previous prime is 61579697489. The next prime is 61579697539.

61579697516 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4388720 + ... + 4402728.

It is an arithmetic number, because the mean of its divisors is an integer number (2400753600).

Almost surely, 2^61579697516 is an apocalyptic number.

It is an amenable number.

61579697516 is a deficient number, since it is larger than the sum of its proper divisors (53656475284).

61579697516 is a wasteful number, since it uses less digits than its factorization.

61579697516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14666 (or 14664 counting only the distinct ones).

The product of its digits is 21432600, while the sum is 62.

The spelling of 61579697516 in words is "sixty-one billion, five hundred seventy-nine million, six hundred ninety-seven thousand, five hundred sixteen".