71886918632 has 8 divisors (see below), whose sum is σ = 134787972450. Its totient is φ = 35943459312.

The previous prime is 71886918619. The next prime is 71886918671. The reversal of 71886918632 is 23681968817.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 71692204516 + 194714116 = 267754^2 + 13954^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4492932407 + ... + 4492932422.

Almost surely, 2^71886918632 is an apocalyptic number.

It is an amenable number.

71886918632 is a deficient number, since it is larger than the sum of its proper divisors (62901053818).

71886918632 is a wasteful number, since it uses less digits than its factorization.

71886918632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8985864835 (or 8985864831 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 59.

The spelling of 71886918632 in words is "seventy-one billion, eight hundred eighty-six million, nine hundred eighteen thousand, six hundred thirty-two".