81923667060 has 24 divisors (see below), whose sum is σ = 229386267936. Its totient is φ = 21846311200.

The previous prime is 81923667017. The next prime is 81923667071. The reversal of 81923667060 is 6076632918.

It is a super-2 number, since 2×81923667060² (a number of 23 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 7 ways as a sum of consecutive naturals, for example, 682697166 + ... + 682697285.

It is an arithmetic number, because the mean of its divisors is an integer number (9557761164).

Almost surely, 2^81923667060 is an apocalyptic number.

It is an amenable number.

81923667060 is an abundant number, since it is smaller than the sum of its proper divisors (147462600876).

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

81923667060 is a wasteful number, since it uses less digits than its factorization.

81923667060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365394463 (or 1365394461 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 81923667060 in words is "eighty-one billion, nine hundred twenty-three million, six hundred sixty-seven thousand, sixty".