81371626 has 8 divisors (see below), whose sum is σ = 139494240. Its totient is φ = 34873548.

The previous prime is 81371603. The next prime is 81371629. The reversal of 81371626 is 62617318.

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

It is a junction number, because it is equal to n+sod(n) for n = 81371591 and 81371600.

It is not an unprimeable number, because it can be changed into a prime (81371629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2906116 + ... + 2906143.

It is an arithmetic number, because the mean of its divisors is an integer number (17436780).

Almost surely, 2^81371626 is an apocalyptic number.

81371626 is a deficient number, since it is larger than the sum of its proper divisors (58122614).

81371626 is a wasteful number, since it uses less digits than its factorization.

81371626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5812268.

The product of its digits is 12096, while the sum is 34.

The square root of 81371626 is about 9020.6222623498. The cubic root of 81371626 is about 433.3355622502.

The spelling of 81371626 in words is "eighty-one million, three hundred seventy-one thousand, six hundred twenty-six".