40640961157 has 32 divisors (see below), whose sum is σ = 43148851200. Its totient is φ = 38228889600.

The previous prime is 40640961143. The next prime is 40640961161. The reversal of 40640961157 is 75116904604.

It is a cyclic number.

It is not a de Polignac number, because 40640961157 - 2¹¹ = 40640959109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40640964157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48439344 + ... + 48440182.

It is an arithmetic number, because the mean of its divisors is an integer number (1348401600).

Almost surely, 2^40640961157 is an apocalyptic number.

It is an amenable number.

40640961157 is a deficient number, since it is larger than the sum of its proper divisors (2507890043).

40640961157 is a wasteful number, since it uses less digits than its factorization.

40640961157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 40640961157 in words is "forty billion, six hundred forty million, nine hundred sixty-one thousand, one hundred fifty-seven".