40687834381 has 4 divisors (see below), whose sum is σ = 40704092512. Its totient is φ = 40671576252.

The previous prime is 40687834379. The next prime is 40687834393. The reversal of 40687834381 is 18343878604.

40687834381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40687834381 - 2¹ = 40687834379 is a prime.

It is a super-2 number, since 2×40687834381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40687834351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8125311 + ... + 8130316.

It is an arithmetic number, because the mean of its divisors is an integer number (10176023128).

Almost surely, 2^40687834381 is an apocalyptic number.

It is an amenable number.

40687834381 is a deficient number, since it is larger than the sum of its proper divisors (16258131).

40687834381 is a wasteful number, since it uses less digits than its factorization.

40687834381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16258130.

The product of its (nonzero) digits is 3096576, while the sum is 52.

The spelling of 40687834381 in words is "forty billion, six hundred eighty-seven million, eight hundred thirty-four thousand, three hundred eighty-one".