72961523711 has 4 divisors (see below), whose sum is σ = 73050393624. Its totient is φ = 72872653800.

The previous prime is 72961523707. The next prime is 72961523741. The reversal of 72961523711 is 11732516927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11732516927 = 431 ⋅27221617.

It is a cyclic number.

It is not a de Polignac number, because 72961523711 - 2² = 72961523707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72961523741) 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, 44433725 + ... + 44435366.

It is an arithmetic number, because the mean of its divisors is an integer number (18262598406).

Almost surely, 2^72961523711 is an apocalyptic number.

72961523711 is a deficient number, since it is larger than the sum of its proper divisors (88869913).

72961523711 is an equidigital number, since it uses as much as digits as its factorization.

72961523711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88869912.

The product of its digits is 158760, while the sum is 44.

The spelling of 72961523711 in words is "seventy-two billion, nine hundred sixty-one million, five hundred twenty-three thousand, seven hundred eleven".