72215345890767 has 4 divisors (see below), whose sum is σ = 96287127854360. Its totient is φ = 48143563927176.

The previous prime is 72215345890679. The next prime is 72215345890781. The reversal of 72215345890767 is 76709854351227.

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

It is not a de Polignac number, because 72215345890767 - 2²³ = 72215337502159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72215345890698 and 72215345890707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72215345880767) 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, 12035890981792 + ... + 12035890981797.

It is an arithmetic number, because the mean of its divisors is an integer number (24071781963590).

It is a 1-persistent number, because it is pandigital, but 2⋅72215345890767 = 144430691781534 is not.

Almost surely, 2^{72215345890767} is an apocalyptic number.

72215345890767 is a deficient number, since it is larger than the sum of its proper divisors (24071781963593).

72215345890767 is a wasteful number, since it uses less digits than its factorization.

72215345890767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24071781963592.

The product of its (nonzero) digits is 177811200, while the sum is 66.

The spelling of 72215345890767 in words is "seventy-two trillion, two hundred fifteen billion, three hundred forty-five million, eight hundred ninety thousand, seven hundred sixty-seven".