61718644332 has 120 divisors (see below), whose sum is σ = 163951621680. Its totient is φ = 20241239040.

The previous prime is 61718644321. The next prime is 61718644397. The reversal of 61718644332 is 23344681716.

61718644332 is a `hidden beast` number, since 6 + 171 + 8 + 6 + 443 + 32 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 29543544 + ... + 29545632.

It is an arithmetic number, because the mean of its divisors is an integer number (1366263514).

Almost surely, 2^61718644332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61718644332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81975810840).

61718644332 is an abundant number, since it is smaller than the sum of its proper divisors (102232977348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61718644332 is a wasteful number, since it uses less digits than its factorization.

61718644332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3533 (or 3522 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The spelling of 61718644332 in words is "sixty-one billion, seven hundred eighteen million, six hundred forty-four thousand, three hundred thirty-two".