72152844113657 has 8 divisors (see below), whose sum is σ = 72894954995016. Its totient is φ = 71414309670912.

The previous prime is 72152844113593. The next prime is 72152844113771. The reversal of 72152844113657 is 75631144825127.

It can be written as a sum of positive squares in 4 ways, for example, as 12845887501456 + 59306956612201 = 3584116^2 + 7701101^2 .

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 72152844113657 - 2⁶ = 72152844113593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72152844118657) 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, 894069098 + ... + 894149795.

It is an arithmetic number, because the mean of its divisors is an integer number (9111869374377).

Almost surely, 2^{72152844113657} is an apocalyptic number.

It is an amenable number.

72152844113657 is a deficient number, since it is larger than the sum of its proper divisors (742110881359).

72152844113657 is a wasteful number, since it uses less digits than its factorization.

72152844113657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788219307.

The product of its digits is 11289600, while the sum is 56.

The spelling of 72152844113657 in words is "seventy-two trillion, one hundred fifty-two billion, eight hundred forty-four million, one hundred thirteen thousand, six hundred fifty-seven".