72077966475591 has 8 divisors (see below), whose sum is σ = 99204082891264. Its totient is φ = 46501913855160.

The previous prime is 72077966475577. The next prime is 72077966475659. The reversal of 72077966475591 is 19557466977027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72077966475591 - 2¹⁸ = 72077966213447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72077966475511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387515948701 + ... + 387515948886.

It is an arithmetic number, because the mean of its divisors is an integer number (12400510361408).

Almost surely, 2^{72077966475591} is an apocalyptic number.

72077966475591 is a deficient number, since it is larger than the sum of its proper divisors (27126116415673).

72077966475591 is a wasteful number, since it uses less digits than its factorization.

72077966475591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775031897621.

The product of its (nonzero) digits is 1400263200, while the sum is 75.

The spelling of 72077966475591 in words is "seventy-two trillion, seventy-seven billion, nine hundred sixty-six million, four hundred seventy-five thousand, five hundred ninety-one".