40555613040781 has 4 divisors (see below), whose sum is σ = 40600327058272. Its totient is φ = 40510899023292.

The previous prime is 40555613040751. The next prime is 40555613040797. The reversal of 40555613040781 is 18704031655504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40555613040781 - 2⁵ = 40555613040749 is a prime.

It is a super-2 number, since 2×40555613040781² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40555613040751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22357007385 + ... + 22357009198.

It is an arithmetic number, because the mean of its divisors is an integer number (10150081764568).

Almost surely, 2^{40555613040781} is an apocalyptic number.

It is an amenable number.

40555613040781 is a deficient number, since it is larger than the sum of its proper divisors (44714017491).

40555613040781 is an equidigital number, since it uses as much as digits as its factorization.

40555613040781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44714017490.

The product of its (nonzero) digits is 2016000, while the sum is 49.

The spelling of 40555613040781 in words is "forty trillion, five hundred fifty-five billion, six hundred thirteen million, forty thousand, seven hundred eighty-one".