83145454138 has 4 divisors (see below), whose sum is σ = 124718181210. Its totient is φ = 41572727068.

The previous prime is 83145454123. The next prime is 83145454289.

83145454138 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 64934761329 + 18210692809 = 254823^2 + 134947^2 .

It is a super-2 number, since 2×83145454138² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20786363533 + ... + 20786363536.

Almost surely, 2^83145454138 is an apocalyptic number.

83145454138 is a deficient number, since it is larger than the sum of its proper divisors (41572727072).

83145454138 is a wasteful number, since it uses less digits than its factorization.

83145454138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41572727071.

The product of its digits is 921600, while the sum is 46.

The spelling of 83145454138 in words is "eighty-three billion, one hundred forty-five million, four hundred fifty-four thousand, one hundred thirty-eight".