81040052626 has 32 divisors (see below), whose sum is σ = 137424268800. Its totient is φ = 35583027840.

The previous prime is 81040052573. The next prime is 81040052663. The reversal of 81040052626 is 62625004018.

It is a junction number, because it is equal to n+sod(n) for n = 81040052591 and 81040052600.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 804531 + ... + 899638.

It is an arithmetic number, because the mean of its divisors is an integer number (4294508400).

Almost surely, 2^81040052626 is an apocalyptic number.

81040052626 is a deficient number, since it is larger than the sum of its proper divisors (56384216174).

81040052626 is a wasteful number, since it uses less digits than its factorization.

81040052626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704274.

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 81040052626 in words is "eighty-one billion, forty million, fifty-two thousand, six hundred twenty-six".