40581268555 has 4 divisors (see below), whose sum is σ = 48697522272. Its totient is φ = 32465014840.

The previous prime is 40581268537. The next prime is 40581268577. The reversal of 40581268555 is 55586218504.

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

It is not a de Polignac number, because 40581268555 - 2⁹ = 40581268043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40581268499 and 40581268508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4058126851 + ... + 4058126860.

It is an arithmetic number, because the mean of its divisors is an integer number (12174380568).

Almost surely, 2^40581268555 is an apocalyptic number.

40581268555 is a deficient number, since it is larger than the sum of its proper divisors (8116253717).

40581268555 is an equidigital number, since it uses as much as digits as its factorization.

40581268555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8116253716.

The product of its (nonzero) digits is 1920000, while the sum is 49.

It can be divided in two parts, 40581 and 268555, that added together give a square (309136 = 556²).

The spelling of 40581268555 in words is "forty billion, five hundred eighty-one million, two hundred sixty-eight thousand, five hundred fifty-five".