81580119468 has 48 divisors (see below), whose sum is σ = 199461104640. Its totient is φ = 25902198784.

The previous prime is 81580119449. The next prime is 81580119479. The reversal of 81580119468 is 86491108518.

It is a self number, because there is not a number n which added to its sum of digits gives 81580119468.

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, 552405 + ... + 684332.

It is an arithmetic number, because the mean of its divisors is an integer number (4155439680).

Almost surely, 2^81580119468 is an apocalyptic number.

It is an amenable number.

81580119468 is an abundant number, since it is smaller than the sum of its proper divisors (117880985172).

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

81580119468 is a wasteful number, since it uses less digits than its factorization.

81580119468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237006 (or 1237004 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 51.

The spelling of 81580119468 in words is "eighty-one billion, five hundred eighty million, one hundred nineteen thousand, four hundred sixty-eight".