81590564110 has 32 divisors (see below), whose sum is σ = 160396244064. Its totient is φ = 29635584000.

The previous prime is 81590564101. The next prime is 81590564147. The reversal of 81590564110 is 1146509518.

It is a congruent number.

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, 324051 + ... + 517870.

It is an arithmetic number, because the mean of its divisors is an integer number (5012382627).

Almost surely, 2^81590564110 is an apocalyptic number.

81590564110 is a deficient number, since it is larger than the sum of its proper divisors (78805679954).

81590564110 is a wasteful number, since it uses less digits than its factorization.

81590564110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842820.

The product of its (nonzero) digits is 43200, while the sum is 40.

The spelling of 81590564110 in words is "eighty-one billion, five hundred ninety million, five hundred sixty-four thousand, one hundred ten".