80537393664 has 640 divisors, whose sum is σ = 297769274880. Its totient is φ = 20925775872.

The previous prime is 80537393659. The next prime is 80537393669. The reversal of 80537393664 is 46639373508.

It is an interprime number because it is at equal distance from previous prime (80537393659) and next prime (80537393669).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 80537393664.

It is not an unprimeable number, because it can be changed into a prime (80537393669) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 91832394 + ... + 91833270.

It is an arithmetic number, because the mean of its divisors is an integer number (465264492).

Almost surely, 2^80537393664 is an apocalyptic number.

80537393664 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80537393664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148884637440).

80537393664 is an abundant number, since it is smaller than the sum of its proper divisors (217231881216).

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

80537393664 is a wasteful number, since it uses less digits than its factorization.

80537393664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997 (or 975 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 54.

The spelling of 80537393664 in words is "eighty billion, five hundred thirty-seven million, three hundred ninety-three thousand, six hundred sixty-four".