140394445731 has 6 divisors (see below), whose sum is σ = 202791977180. Its totient is φ = 93596297148.

The previous prime is 140394445721. The next prime is 140394445739. The reversal of 140394445731 is 137544493041.

It is a happy number.

140394445731 is a `hidden beast` number, since 1 + 4 + 0 + 39 + 4 + 44 + 573 + 1 = 666.

It is not a de Polignac number, because 140394445731 - 2¹³ = 140394437539 is a prime.

It is a super-2 number, since 2×140394445731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140394445739) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7799691421 + ... + 7799691438.

Almost surely, 2^140394445731 is an apocalyptic number.

140394445731 is a deficient number, since it is larger than the sum of its proper divisors (62397531449).

140394445731 is a wasteful number, since it uses less digits than its factorization.

140394445731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15599382865 (or 15599382862 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 140394445731 in words is "one hundred forty billion, three hundred ninety-four million, four hundred forty-five thousand, seven hundred thirty-one".