40342781679 has 8 divisors (see below), whose sum is σ = 54934851840. Its totient is φ = 26322949656.

The previous prime is 40342781657. The next prime is 40342781723. The reversal of 40342781679 is 97618724304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40342781679 - 2⁷ = 40342781551 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40342781179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143059369 + ... + 143059650.

It is an arithmetic number, because the mean of its divisors is an integer number (6866856480).

Almost surely, 2^40342781679 is an apocalyptic number.

40342781679 is a deficient number, since it is larger than the sum of its proper divisors (14592070161).

40342781679 is a wasteful number, since it uses less digits than its factorization.

40342781679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286119069.

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 40342781679 in words is "forty billion, three hundred forty-two million, seven hundred eighty-one thousand, six hundred seventy-nine".