61634711632 has 20 divisors (see below), whose sum is σ = 128603196820. Its totient is φ = 28446789888.

The previous prime is 61634711603. The next prime is 61634711681. The reversal of 61634711632 is 23611743616.

It can be written as a sum of positive squares in 2 ways, for example, as 11934251536 + 49700460096 = 109244^2 + 222936^2 .

It is a super-2 number, since 2×61634711632² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 148160157 + ... + 148160572.

It is an arithmetic number, because the mean of its divisors is an integer number (6430159841).

Almost surely, 2^61634711632 is an apocalyptic number.

It is an amenable number.

61634711632 is an abundant number, since it is smaller than the sum of its proper divisors (66968485188).

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

61634711632 is a wasteful number, since it uses less digits than its factorization.

61634711632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296320750 (or 296320744 counting only the distinct ones).

The product of its digits is 108864, while the sum is 40.

The spelling of 61634711632 in words is "sixty-one billion, six hundred thirty-four million, seven hundred eleven thousand, six hundred thirty-two".