81632122588 has 18 divisors (see below), whose sum is σ = 151753835576. Its totient is φ = 38415115968.

The previous prime is 81632122547. The next prime is 81632122589. The reversal of 81632122588 is 88522123618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81632122589) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35306856 + ... + 35309167.

Almost surely, 2^81632122588 is an apocalyptic number.

It is an amenable number.

81632122588 is a deficient number, since it is larger than the sum of its proper divisors (70121712988).

81632122588 is a wasteful number, since it uses less digits than its factorization.

81632122588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70616061 (or 70616042 counting only the distinct ones).

The product of its digits is 368640, while the sum is 46.

The spelling of 81632122588 in words is "eighty-one billion, six hundred thirty-two million, one hundred twenty-two thousand, five hundred eighty-eight".