140083231638 has 24 divisors (see below), whose sum is σ = 325907927352. Its totient is φ = 40023780384.

The previous prime is 140083231609. The next prime is 140083231643. The reversal of 140083231638 is 836132380041.

It is a super-2 number, since 2×140083231638² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 140083231596 and 140083231605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 238236495 + ... + 238237082.

It is an arithmetic number, because the mean of its divisors is an integer number (13579496973).

Almost surely, 2^140083231638 is an apocalyptic number.

140083231638 is an abundant number, since it is smaller than the sum of its proper divisors (185824695714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140083231638 is a wasteful number, since it uses less digits than its factorization.

140083231638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476473596 (or 476473589 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 140083231638 in words is "one hundred forty billion, eighty-three million, two hundred thirty-one thousand, six hundred thirty-eight".