72611370137 has 4 divisors (see below), whose sum is σ = 73141380276. Its totient is φ = 72081360000.

The previous prime is 72611370133. The next prime is 72611370149. The reversal of 72611370137 is 73107311627.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45668117401 + 26943252736 = 213701^2 + 164144^2 .

It is a cyclic number.

It is not a de Polignac number, because 72611370137 - 2² = 72611370133 is a prime.

It is a super-2 number, since 2×72611370137² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72611370137.

It is not an unprimeable number, because it can be changed into a prime (72611370133) 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, 265004864 + ... + 265005137.

It is an arithmetic number, because the mean of its divisors is an integer number (18285345069).

Almost surely, 2^72611370137 is an apocalyptic number.

It is an amenable number.

72611370137 is a deficient number, since it is larger than the sum of its proper divisors (530010139).

72611370137 is a wasteful number, since it uses less digits than its factorization.

72611370137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530010138.

The product of its (nonzero) digits is 37044, while the sum is 38.

The spelling of 72611370137 in words is "seventy-two billion, six hundred eleven million, three hundred seventy thousand, one hundred thirty-seven".