71607821315 has 4 divisors (see below), whose sum is σ = 85929385584. Its totient is φ = 57286257048.

The previous prime is 71607821303. The next prime is 71607821317. The reversal of 71607821315 is 51312870617.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 71607821315 - 2²⁴ = 71591044099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71607821317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7160782127 + ... + 7160782136.

It is an arithmetic number, because the mean of its divisors is an integer number (21482346396).

Almost surely, 2^71607821315 is an apocalyptic number.

71607821315 is a deficient number, since it is larger than the sum of its proper divisors (14321564269).

71607821315 is a wasteful number, since it uses less digits than its factorization.

71607821315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14321564268.

The product of its (nonzero) digits is 70560, while the sum is 41.

The spelling of 71607821315 in words is "seventy-one billion, six hundred seven million, eight hundred twenty-one thousand, three hundred fifteen".