72311163285 has 16 divisors (see below), whose sum is σ = 116246197440. Its totient is φ = 38383175040.

The previous prime is 72311163277. The next prime is 72311163289. The reversal of 72311163285 is 58236111327.

It is a happy number.

It is not a de Polignac number, because 72311163285 - 2³ = 72311163277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72311163289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11420400 + ... + 11426729.

It is an arithmetic number, because the mean of its divisors is an integer number (7265387340).

Almost surely, 2^72311163285 is an apocalyptic number.

It is an amenable number.

72311163285 is a deficient number, since it is larger than the sum of its proper divisors (43935034155).

72311163285 is a wasteful number, since it uses less digits than its factorization.

72311163285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22847348.

The product of its digits is 60480, while the sum is 39.

The spelling of 72311163285 in words is "seventy-two billion, three hundred eleven million, one hundred sixty-three thousand, two hundred eighty-five".