81488740152 has 16 divisors (see below), whose sum is σ = 203721850440. Its totient is φ = 27162913376.

The previous prime is 81488740141. The next prime is 81488740199. The reversal of 81488740152 is 25104788418.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1697682063 + ... + 1697682110.

Almost surely, 2^81488740152 is an apocalyptic number.

It is an amenable number.

81488740152 is an abundant number, since it is smaller than the sum of its proper divisors (122233110288).

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

81488740152 is a wasteful number, since it uses less digits than its factorization.

81488740152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3395364182 (or 3395364178 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 48.

The spelling of 81488740152 in words is "eighty-one billion, four hundred eighty-eight million, seven hundred forty thousand, one hundred fifty-two".