40155261642 has 24 divisors (see below), whose sum is σ = 89026395744. Its totient is φ = 13073805864.

The previous prime is 40155261613. The next prime is 40155261659. The reversal of 40155261642 is 24616255104.

40155261642 is a `hidden beast` number, since 4 + 0 + 1 + 5 + 5 + 2 + 6 + 1 + 642 = 666.

It is a super-2 number, since 2×40155261642² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40155261597 and 40155261606.

It is an unprimeable number.

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, 25939318 + ... + 25940865.

It is an arithmetic number, because the mean of its divisors is an integer number (3709433156).

Almost surely, 2^40155261642 is an apocalyptic number.

40155261642 is an abundant number, since it is smaller than the sum of its proper divisors (48871134102).

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

40155261642 is a wasteful number, since it uses less digits than its factorization.

40155261642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51880234 (or 51880231 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 40155261642 in words is "forty billion, one hundred fifty-five million, two hundred sixty-one thousand, six hundred forty-two".