72015611311 has 4 divisors (see below), whose sum is σ = 82303555792. Its totient is φ = 61727666832.

The previous prime is 72015611287. The next prime is 72015611383. The reversal of 72015611311 is 11311651027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11311651027 = 1949 ⋅5803823.

It is a cyclic number.

It is not a de Polignac number, because 72015611311 - 2⁷ = 72015611183 is a prime.

It is a super-2 number, since 2×72015611311² (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 72015611311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72015671311) 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, 5143972230 + ... + 5143972243.

It is an arithmetic number, because the mean of its divisors is an integer number (20575888948).

Almost surely, 2^72015611311 is an apocalyptic number.

72015611311 is a deficient number, since it is larger than the sum of its proper divisors (10287944481).

72015611311 is a wasteful number, since it uses less digits than its factorization.

72015611311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10287944480.

The product of its (nonzero) digits is 1260, while the sum is 28.

The spelling of 72015611311 in words is "seventy-two billion, fifteen million, six hundred eleven thousand, three hundred eleven".