81623923162 has 8 divisors (see below), whose sum is σ = 122437132992. Its totient is φ = 40811545500.

The previous prime is 81623923159. The next prime is 81623923193. The reversal of 81623923162 is 26132932618.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 187837 + ... + 445567.

It is an arithmetic number, because the mean of its divisors is an integer number (15304641624).

Almost surely, 2^81623923162 is an apocalyptic number.

81623923162 is a deficient number, since it is larger than the sum of its proper divisors (40813209830).

81623923162 is a wasteful number, since it uses less digits than its factorization.

81623923162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416084.

The product of its digits is 186624, while the sum is 43.

The spelling of 81623923162 in words is "eighty-one billion, six hundred twenty-three million, nine hundred twenty-three thousand, one hundred sixty-two".