80715915257520 has 160 divisors (see below), whose sum is σ = 252894481931520. Its totient is φ = 21295344931840.

The previous prime is 80715915257519. The next prime is 80715915257521. The reversal of 80715915257520 is 2575251951708.

It is an interprime number because it is at equal distance from previous prime (80715915257519) and next prime (80715915257521).

It is not an unprimeable number, because it can be changed into a prime (80715915257521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3694435 + ... + 13231805.

It is an arithmetic number, because the mean of its divisors is an integer number (1580590512072).

Almost surely, 2^{80715915257520} is an apocalyptic number.

80715915257520 is a gapful number since it is divisible by the number (80) 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 80715915257520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126447240965760).

80715915257520 is an abundant number, since it is smaller than the sum of its proper divisors (172178566674000).

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

80715915257520 is a wasteful number, since it uses less digits than its factorization.

80715915257520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9537763 (or 9537757 counting only the distinct ones).

The product of its (nonzero) digits is 8820000, while the sum is 57.

The spelling of 80715915257520 in words is "eighty trillion, seven hundred fifteen billion, nine hundred fifteen million, two hundred fifty-seven thousand, five hundred twenty".