82649978994 has 32 divisors (see below), whose sum is σ = 180451543104. Its totient is φ = 25028182080.

The previous prime is 82649978951. The next prime is 82649979037. The reversal of 82649978994 is 49987994628.

It is an interprime number because it is at equal distance from previous prime (82649978951) and next prime (82649979037).

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, 335029 + ... + 526824.

It is an arithmetic number, because the mean of its divisors is an integer number (5639110722).

Almost surely, 2^82649978994 is an apocalyptic number.

82649978994 is an abundant number, since it is smaller than the sum of its proper divisors (97801564110).

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

82649978994 is a wasteful number, since it uses less digits than its factorization.

82649978994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863322.

The product of its digits is 564350976, while the sum is 75.

The spelling of 82649978994 in words is "eighty-two billion, six hundred forty-nine million, nine hundred seventy-eight thousand, nine hundred ninety-four".