80260779990 has 128 divisors (see below), whose sum is σ = 210828718080. Its totient is φ = 19494908928.

The previous prime is 80260779931. The next prime is 80260780021. The reversal of 80260779990 is 9997706208.

It is a self number, because there is not a number n which added to its sum of digits gives 80260779990.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1166466 + ... + 1233354.

It is an arithmetic number, because the mean of its divisors is an integer number (1647099360).

Almost surely, 2^80260779990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80260779990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105414359040).

80260779990 is an abundant number, since it is smaller than the sum of its proper divisors (130567938090).

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

80260779990 is a wasteful number, since it uses less digits than its factorization.

80260779990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67006.

The product of its (nonzero) digits is 3429216, while the sum is 57.

The spelling of 80260779990 in words is "eighty billion, two hundred sixty million, seven hundred seventy-nine thousand, nine hundred ninety".