40891163949 has 12 divisors (see below), whose sum is σ = 59079095712. Its totient is φ = 27254277000.

The previous prime is 40891163933. The next prime is 40891163959. The reversal of 40891163949 is 94936119804.

It is a happy number.

40891163949 is a `hidden beast` number, since 408 + 91 + 1 + 63 + 94 + 9 = 666.

It is not a de Polignac number, because 40891163949 - 2⁴ = 40891163933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40891163895 and 40891163904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40891163959) 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 11 ways as a sum of consecutive naturals, for example, 501577 + ... + 577374.

It is an arithmetic number, because the mean of its divisors is an integer number (4923257976).

Almost surely, 2^40891163949 is an apocalyptic number.

It is an amenable number.

40891163949 is a deficient number, since it is larger than the sum of its proper divisors (18187931763).

40891163949 is a wasteful number, since it uses less digits than its factorization.

40891163949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083168 (or 1083165 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 40891163949 in words is "forty billion, eight hundred ninety-one million, one hundred sixty-three thousand, nine hundred forty-nine".