82740981664 has 48 divisors (see below), whose sum is σ = 178448780160. Its totient is φ = 37452136960.

The previous prime is 82740981649. The next prime is 82740981677. The reversal of 82740981664 is 46618904728.

It is a happy number.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

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, 407629 + ... + 575884.

It is an arithmetic number, because the mean of its divisors is an integer number (3717682920).

Almost surely, 2^82740981664 is an apocalyptic number.

It is an amenable number.

82740981664 is an abundant number, since it is smaller than the sum of its proper divisors (95707798496).

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

82740981664 is a wasteful number, since it uses less digits than its factorization.

82740981664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983773 (or 983765 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 55.

The spelling of 82740981664 in words is "eighty-two billion, seven hundred forty million, nine hundred eighty-one thousand, six hundred sixty-four".