72613637372137 has 4 divisors (see below), whose sum is σ = 72982234516356. Its totient is φ = 72245040227920.

The previous prime is 72613637372051. The next prime is 72613637372167. The reversal of 72613637372137 is 73127373631627.

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 40034839181481 + 32578798190656 = 6327309^2 + 5707784^2 .

It is a cyclic number.

It is not a de Polignac number, because 72613637372137 - 2⁷ = 72613637372009 is a prime.

It is a super-2 number, since 2×72613637372137² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72613637372167) 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, 184298571814 + ... + 184298572207.

It is an arithmetic number, because the mean of its divisors is an integer number (18245558629089).

Almost surely, 2^{72613637372137} is an apocalyptic number.

It is an amenable number.

72613637372137 is a deficient number, since it is larger than the sum of its proper divisors (368597144219).

72613637372137 is a wasteful number, since it uses less digits than its factorization.

72613637372137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368597144218.

The product of its digits is 28005264, while the sum is 58.

The spelling of 72613637372137 in words is "seventy-two trillion, six hundred thirteen billion, six hundred thirty-seven million, three hundred seventy-two thousand, one hundred thirty-seven".