72137201591 has 16 divisors (see below), whose sum is σ = 89462005248. Its totient is φ = 56639887200.

The previous prime is 72137201573. The next prime is 72137201611. The reversal of 72137201591 is 19510273127.

It is not a de Polignac number, because 72137201591 - 2⁶ = 72137201527 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72137201291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3013715 + ... + 3037556.

It is an arithmetic number, because the mean of its divisors is an integer number (5591375328).

Almost surely, 2^72137201591 is an apocalyptic number.

72137201591 is a deficient number, since it is larger than the sum of its proper divisors (17324803657).

72137201591 is a wasteful number, since it uses less digits than its factorization.

72137201591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6051422.

The product of its (nonzero) digits is 26460, while the sum is 38.

The spelling of 72137201591 in words is "seventy-two billion, one hundred thirty-seven million, two hundred one thousand, five hundred ninety-one".