81347914590 has 64 divisors (see below), whose sum is σ = 195828675840. Its totient is φ = 21626922240.

The previous prime is 81347914579. The next prime is 81347914601. The reversal of 81347914590 is 9541974318.

It is an interprime number because it is at equal distance from previous prime (81347914579) and next prime (81347914601).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15008901 + ... + 15014319.

It is an arithmetic number, because the mean of its divisors is an integer number (3059823060).

Almost surely, 2^81347914590 is an apocalyptic number.

81347914590 is an abundant number, since it is smaller than the sum of its proper divisors (114480761250).

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

81347914590 is a wasteful number, since it uses less digits than its factorization.

81347914590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6857.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 81347914590 in words is "eighty-one billion, three hundred forty-seven million, nine hundred fourteen thousand, five hundred ninety".