40002891655540 has 48 divisors (see below), whose sum is σ = 91649354658624. Its totient is φ = 14545495500800.

The previous prime is 40002891655511. The next prime is 40002891655547. The reversal of 40002891655540 is 4555619820004.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40002891655547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3138349 + ... + 9479188.

It is an arithmetic number, because the mean of its divisors is an integer number (1909361555388).

Almost surely, 2^{40002891655540} is an apocalyptic number.

It is an amenable number.

40002891655540 is an abundant number, since it is smaller than the sum of its proper divisors (51646463003084).

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

40002891655540 is a wasteful number, since it uses less digits than its factorization.

40002891655540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12631968 (or 12631966 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 49.

The spelling of 40002891655540 in words is "forty trillion, two billion, eight hundred ninety-one million, six hundred fifty-five thousand, five hundred forty".