40891077678 has 32 divisors (see below), whose sum is σ = 91392924672. Its totient is φ = 12089009600.

The previous prime is 40891077671. The next prime is 40891077683. The reversal of 40891077678 is 87677019804.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40891077671) 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, 7552926 + ... + 7558337.

It is an arithmetic number, because the mean of its divisors is an integer number (2856028896).

Almost surely, 2^40891077678 is an apocalyptic number.

40891077678 is an abundant number, since it is smaller than the sum of its proper divisors (50501846994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40891077678 is a wasteful number, since it uses less digits than its factorization.

40891077678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15111320.

The product of its (nonzero) digits is 4741632, while the sum is 57.

The spelling of 40891077678 in words is "forty billion, eight hundred ninety-one million, seventy-seven thousand, six hundred seventy-eight".