61586930491 has 4 divisors (see below), whose sum is σ = 61630954000. Its totient is φ = 61542906984.

The previous prime is 61586930479. The next prime is 61586930497. The reversal of 61586930491 is 19403968516.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61586930491 - 2⁵ = 61586930459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61586930497) 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, 22009656 + ... + 22012453.

It is an arithmetic number, because the mean of its divisors is an integer number (15407738500).

Almost surely, 2^61586930491 is an apocalyptic number.

61586930491 is a deficient number, since it is larger than the sum of its proper divisors (44023509).

61586930491 is a wasteful number, since it uses less digits than its factorization.

61586930491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44023508.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 61586930491 in words is "sixty-one billion, five hundred eighty-six million, nine hundred thirty thousand, four hundred ninety-one".