72087782157 has 6 divisors (see below), whose sum is σ = 104126796462. Its totient is φ = 48058521432.

The previous prime is 72087782147. The next prime is 72087782191. The reversal of 72087782157 is 75128778027.

It can be written as a sum of positive squares in only one way, i.e., 71919976041 + 167806116 = 268179^2 + 12954^2 .

It is not a de Polignac number, because 72087782157 - 2⁶ = 72087782093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72087782147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4004876778 + ... + 4004876795.

It is an arithmetic number, because the mean of its divisors is an integer number (17354466077).

Almost surely, 2^72087782157 is an apocalyptic number.

It is an amenable number.

72087782157 is a deficient number, since it is larger than the sum of its proper divisors (32039014305).

72087782157 is a wasteful number, since it uses less digits than its factorization.

72087782157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8009753579 (or 8009753576 counting only the distinct ones).

The product of its (nonzero) digits is 3073280, while the sum is 54.

The spelling of 72087782157 in words is "seventy-two billion, eighty-seven million, seven hundred eighty-two thousand, one hundred fifty-seven".