40642157886 has 16 divisors (see below), whose sum is σ = 88673799168. Its totient is φ = 12315805400.

The previous prime is 40642157869. The next prime is 40642157887. The reversal of 40642157886 is 68875124604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40642157887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307895070 + ... + 307895201.

It is an arithmetic number, because the mean of its divisors is an integer number (5542112448).

Almost surely, 2^40642157886 is an apocalyptic number.

40642157886 is an abundant number, since it is smaller than the sum of its proper divisors (48031641282).

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

40642157886 is a wasteful number, since it uses less digits than its factorization.

40642157886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615790287.

The product of its (nonzero) digits is 2580480, while the sum is 51.

The spelling of 40642157886 in words is "forty billion, six hundred forty-two million, one hundred fifty-seven thousand, eight hundred eighty-six".