61111721674 has 8 divisors (see below), whose sum is σ = 91668919140. Its totient is φ = 30555415296.

The previous prime is 61111721633. The next prime is 61111721681. The reversal of 61111721674 is 47612711116.

It can be written as a sum of positive squares in 2 ways, for example, as 50470767649 + 10640954025 = 224657^2 + 103155^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11089 + ... + 349780.

Almost surely, 2^61111721674 is an apocalyptic number.

61111721674 is a deficient number, since it is larger than the sum of its proper divisors (30557197466).

61111721674 is a wasteful number, since it uses less digits than its factorization.

61111721674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445544.

The product of its digits is 14112, while the sum is 37.

The spelling of 61111721674 in words is "sixty-one billion, one hundred eleven million, seven hundred twenty-one thousand, six hundred seventy-four".