72660156737091 has 16 divisors (see below), whose sum is σ = 120785715095808. Its totient is φ = 37745535967200.

The previous prime is 72660156737089. The next prime is 72660156737093. The reversal of 72660156737091 is 19073765106627.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72660156737089) and next prime (72660156737093).

It is not a de Polignac number, because 72660156737091 - 2¹ = 72660156737089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72660156737093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157273066300 + ... + 157273066761.

It is an arithmetic number, because the mean of its divisors is an integer number (7549107193488).

Almost surely, 2^{72660156737091} is an apocalyptic number.

72660156737091 is a deficient number, since it is larger than the sum of its proper divisors (48125558358717).

72660156737091 is a wasteful number, since it uses less digits than its factorization.

72660156737091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314546133082.

The product of its (nonzero) digits is 20003760, while the sum is 60.

The spelling of 72660156737091 in words is "seventy-two trillion, six hundred sixty billion, one hundred fifty-six million, seven hundred thirty-seven thousand, ninety-one".