240640677381 has 16 divisors (see below), whose sum is σ = 360558608256. Its totient is φ = 141648023616.

The previous prime is 240640677353. The next prime is 240640677383. The reversal of 240640677381 is 183776046042.

It is a happy number.

It is not a de Polignac number, because 240640677381 - 2⁵ = 240640677349 is a prime.

It is a super-2 number, since 2×240640677381² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 240640677381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240640677383) 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, 134135490 + ... + 134137283.

It is an arithmetic number, because the mean of its divisors is an integer number (22534913016).

Almost surely, 2^240640677381 is an apocalyptic number.

It is an amenable number.

240640677381 is a deficient number, since it is larger than the sum of its proper divisors (119917930875).

240640677381 is a wasteful number, since it uses less digits than its factorization.

240640677381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268272812.

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 240640677381 in words is "two hundred forty billion, six hundred forty million, six hundred seventy-seven thousand, three hundred eighty-one".