80715915257522 has 4 divisors (see below), whose sum is σ = 121073872886286. Its totient is φ = 40357957628760.

The previous prime is 80715915257521. The next prime is 80715915257531. The reversal of 80715915257522 is 22575251951708.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 60888229154281 + 19827686103241 = 7803091^2 + 4452829^2 .

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

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 as a sum of consecutive naturals, namely, 20178978814379 + ... + 20178978814382.

Almost surely, 2^{80715915257522} is an apocalyptic number.

80715915257522 is a deficient number, since it is larger than the sum of its proper divisors (40357957628764).

80715915257522 is a wasteful number, since it uses less digits than its factorization.

80715915257522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40357957628763.

The product of its (nonzero) digits is 17640000, while the sum is 59.

The spelling of 80715915257522 in words is "eighty trillion, seven hundred fifteen billion, nine hundred fifteen million, two hundred fifty-seven thousand, five hundred twenty-two".