40978131989 has 4 divisors (see below), whose sum is σ = 40986872160. Its totient is φ = 40969391820.

The previous prime is 40978131983. The next prime is 40978132021. The reversal of 40978131989 is 98913187904.

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 40978131989 - 2⁴ = 40978131973 is a prime.

It is a super-2 number, since 2×40978131989² (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 (40978131983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4363049 + ... + 4372430.

It is an arithmetic number, because the mean of its divisors is an integer number (10246718040).

Almost surely, 2^40978131989 is an apocalyptic number.

It is an amenable number.

40978131989 is a deficient number, since it is larger than the sum of its proper divisors (8740171).

40978131989 is an equidigital number, since it uses as much as digits as its factorization.

40978131989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8740170.

The product of its (nonzero) digits is 3919104, while the sum is 59.

The spelling of 40978131989 in words is "forty billion, nine hundred seventy-eight million, one hundred thirty-one thousand, nine hundred eighty-nine".