8154722537138 has 32 divisors (see below), whose sum is σ = 12691935537600. Its totient is φ = 3926768461056.

The previous prime is 8154722537131. The next prime is 8154722537219. The reversal of 8154722537138 is 8317352274518.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8154722537131) 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, 20260718 + ... + 20659286.

It is an arithmetic number, because the mean of its divisors is an integer number (396622985550).

Almost surely, 2^{8154722537138} is an apocalyptic number.

8154722537138 is a deficient number, since it is larger than the sum of its proper divisors (4537213000462).

8154722537138 is a wasteful number, since it uses less digits than its factorization.

8154722537138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401946.

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

The spelling of 8154722537138 in words is "eight trillion, one hundred fifty-four billion, seven hundred twenty-two million, five hundred thirty-seven thousand, one hundred thirty-eight".