81490956954 has 16 divisors (see below), whose sum is σ = 177798451680. Its totient is φ = 24694229360.

The previous prime is 81490956941. The next prime is 81490957027. The reversal of 81490956954 is 45965909418.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617355669 + ... + 617355800.

It is an arithmetic number, because the mean of its divisors is an integer number (11112403230).

Almost surely, 2^81490956954 is an apocalyptic number.

81490956954 is an abundant number, since it is smaller than the sum of its proper divisors (96307494726).

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

81490956954 is a wasteful number, since it uses less digits than its factorization.

81490956954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234711485.

The product of its (nonzero) digits is 13996800, while the sum is 60.

The spelling of 81490956954 in words is "eighty-one billion, four hundred ninety million, nine hundred fifty-six thousand, nine hundred fifty-four".