72791549131 has 6 divisors (see below), whose sum is σ = 84675883740. Its totient is φ = 62392756356.

The previous prime is 72791549101. The next prime is 72791549147. The reversal of 72791549131 is 13194519727.

It is not a de Polignac number, because 72791549131 - 2¹⁷ = 72791418059 is a prime.

It is a super-2 number, since 2×72791549131² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 1485541819 = 72791549131 / (7 + 2 + 7 + 9 + 1 + 5 + 4 + 9 + 1 + 3 + 1).

It is not an unprimeable number, because it can be changed into a prime (72791549101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 742770861 + ... + 742770958.

It is an arithmetic number, because the mean of its divisors is an integer number (14112647290).

Almost surely, 2^72791549131 is an apocalyptic number.

72791549131 is a deficient number, since it is larger than the sum of its proper divisors (11884334609).

72791549131 is a wasteful number, since it uses less digits than its factorization.

72791549131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485541833 (or 1485541826 counting only the distinct ones).

The product of its digits is 476280, while the sum is 49.

The spelling of 72791549131 in words is "seventy-two billion, seven hundred ninety-one million, five hundred forty-nine thousand, one hundred thirty-one".