72112155761 has 8 divisors (see below), whose sum is σ = 75916298880. Its totient is φ = 68308889328.

The previous prime is 72112155743. The next prime is 72112155793. The reversal of 72112155761 is 16755121127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72112155761 - 2¹⁴ = 72112139377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72112155361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46841 + ... + 382646.

It is an arithmetic number, because the mean of its divisors is an integer number (9489537360).

Almost surely, 2^72112155761 is an apocalyptic number.

It is an amenable number.

72112155761 is a deficient number, since it is larger than the sum of its proper divisors (3804143119).

72112155761 is a wasteful number, since it uses less digits than its factorization.

72112155761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438343.

The product of its digits is 29400, while the sum is 38.

Adding to 72112155761 its reverse (16755121127), we get a palindrome (88867276888).

The spelling of 72112155761 in words is "seventy-two billion, one hundred twelve million, one hundred fifty-five thousand, seven hundred sixty-one".