61136622177 has 4 divisors (see below), whose sum is σ = 81515496240. Its totient is φ = 40757748116.

The previous prime is 61136622163. The next prime is 61136622179. The reversal of 61136622177 is 77122663116.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61136622177 - 2²⁰ = 61135573601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61136622179) 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, 10189437027 + ... + 10189437032.

It is an arithmetic number, because the mean of its divisors is an integer number (20378874060).

Almost surely, 2^61136622177 is an apocalyptic number.

It is an amenable number.

61136622177 is a deficient number, since it is larger than the sum of its proper divisors (20378874063).

61136622177 is a wasteful number, since it uses less digits than its factorization.

61136622177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20378874062.

The product of its digits is 127008, while the sum is 42.

The spelling of 61136622177 in words is "sixty-one billion, one hundred thirty-six million, six hundred twenty-two thousand, one hundred seventy-seven".