40542645655 has 4 divisors (see below), whose sum is σ = 48651174792. Its totient is φ = 32434116520.

The previous prime is 40542645599. The next prime is 40542645667. The reversal of 40542645655 is 55654624504.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-40542645655 is a prime.

It is a super-2 number, since 2×40542645655² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4054264561 + ... + 4054264570.

It is an arithmetic number, because the mean of its divisors is an integer number (12162793698).

Almost surely, 2^40542645655 is an apocalyptic number.

40542645655 is a deficient number, since it is larger than the sum of its proper divisors (8108529137).

40542645655 is an equidigital number, since it uses as much as digits as its factorization.

40542645655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8108529136.

The product of its (nonzero) digits is 2880000, while the sum is 46.

The spelling of 40542645655 in words is "forty billion, five hundred forty-two million, six hundred forty-five thousand, six hundred fifty-five".