61658621139 has 8 divisors (see below), whose sum is σ = 82346936320. Its totient is φ = 41038026696.

The previous prime is 61658621117. The next prime is 61658621159. The reversal of 61658621139 is 93112685616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61658621139 - 2²⁵ = 61625066707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61658621159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16928059 + ... + 16931700.

It is an arithmetic number, because the mean of its divisors is an integer number (10293367040).

Almost surely, 2^61658621139 is an apocalyptic number.

61658621139 is a deficient number, since it is larger than the sum of its proper divisors (20688315181).

61658621139 is a wasteful number, since it uses less digits than its factorization.

61658621139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33860369.

The product of its digits is 466560, while the sum is 48.

The spelling of 61658621139 in words is "sixty-one billion, six hundred fifty-eight million, six hundred twenty-one thousand, one hundred thirty-nine".