140305644531 has 40 divisors (see below), whose sum is σ = 231220185504. Its totient is φ = 84236008320.

The previous prime is 140305644511. The next prime is 140305644541. The reversal of 140305644531 is 135446503041.

140305644531 is a `hidden beast` number, since 1 + 4 + 0 + 3 + 0 + 5 + 644 + 5 + 3 + 1 = 666.

It is not a de Polignac number, because 140305644531 - 2⁶ = 140305644467 is a prime.

It is a super-2 number, since 2×140305644531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140305644511) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1581751 + ... + 1668096.

Almost surely, 2^140305644531 is an apocalyptic number.

140305644531 is a deficient number, since it is larger than the sum of its proper divisors (90914540973).

140305644531 is a wasteful number, since it uses less digits than its factorization.

140305644531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3249913 (or 3249904 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 140305644531 in words is "one hundred forty billion, three hundred five million, six hundred forty-four thousand, five hundred thirty-one".