40290955668 has 36 divisors (see below), whose sum is σ = 102018384468. Its totient is φ = 13407663360.

The previous prime is 40290955637. The next prime is 40290955673. The reversal of 40290955668 is 86655909204.

It is a happy number.

40290955668 is a `hidden beast` number, since 4 + 0 + 29 + 0 + 9 + 556 + 68 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 29772812304 + 10518143364 = 172548^2 + 102558^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×40290955668² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 922323 + ... + 965018.

It is an arithmetic number, because the mean of its divisors is an integer number (2833844013).

Almost surely, 2^40290955668 is an apocalyptic number.

It is an amenable number.

40290955668 is an abundant number, since it is smaller than the sum of its proper divisors (61727428800).

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

40290955668 is a wasteful number, since it uses less digits than its factorization.

40290955668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887944 (or 1887939 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 40290955668 in words is "forty billion, two hundred ninety million, nine hundred fifty-five thousand, six hundred sixty-eight".