72156166607 has 16 divisors (see below), whose sum is σ = 82923098112. Its totient is φ = 61504176480.

The previous prime is 72156166603. The next prime is 72156166609. The reversal of 72156166607 is 70666165127.

It is a cyclic number.

It is not a de Polignac number, because 72156166607 - 2² = 72156166603 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 (72156166603) 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, 5238173 + ... + 5251929.

It is an arithmetic number, because the mean of its divisors is an integer number (5182693632).

Almost surely, 2^72156166607 is an apocalyptic number.

72156166607 is a deficient number, since it is larger than the sum of its proper divisors (10766931505).

72156166607 is a wasteful number, since it uses less digits than its factorization.

72156166607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17878.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 72156166607 in words is "seventy-two billion, one hundred fifty-six million, one hundred sixty-six thousand, six hundred seven".