61172220051507 has 8 divisors (see below), whose sum is σ = 81566661003520. Its totient is φ = 40779629566920.

The previous prime is 61172220051497. The next prime is 61172220051521. The reversal of 61172220051507 is 70515002227116.

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

It is not a de Polignac number, because 61172220051507 - 2⁷ = 61172220051379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61172220050507) 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, 462539719 + ... + 462671952.

It is an arithmetic number, because the mean of its divisors is an integer number (10195832625440).

Almost surely, 2^{61172220051507} is an apocalyptic number.

61172220051507 is a deficient number, since it is larger than the sum of its proper divisors (20394440952013).

61172220051507 is a wasteful number, since it uses less digits than its factorization.

61172220051507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925233713.

The product of its (nonzero) digits is 58800, while the sum is 39.

The spelling of 61172220051507 in words is "sixty-one trillion, one hundred seventy-two billion, two hundred twenty million, fifty-one thousand, five hundred seven".