40157955689 has 2 divisors, whose sum is σ = 40157955690. Its totient is φ = 40157955688.

The previous prime is 40157955667. The next prime is 40157955701. The reversal of 40157955689 is 98655975104.

40157955689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38267184400 + 1890771289 = 195620^2 + 43483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40157955689 is a prime.

It is a super-2 number, since 2×40157955689² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40157955619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20078977844 + 20078977845.

It is an arithmetic number, because the mean of its divisors is an integer number (20078977845).

Almost surely, 2^40157955689 is an apocalyptic number.

It is an amenable number.

40157955689 is a deficient number, since it is larger than the sum of its proper divisors (1).

40157955689 is an equidigital number, since it uses as much as digits as its factorization.

40157955689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608000, while the sum is 59.

The spelling of 40157955689 in words is "forty billion, one hundred fifty-seven million, nine hundred fifty-five thousand, six hundred eighty-nine".