40505554431 has 12 divisors (see below), whose sum is σ = 58523922600. Its totient is φ = 26996364720.

The previous prime is 40505554399. The next prime is 40505554433. The reversal of 40505554431 is 13445550504.

It is not a de Polignac number, because 40505554431 - 2⁵ = 40505554399 is a prime.

It is a super-2 number, since 2×40505554431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40505554433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 576456 + ... + 642893.

It is an arithmetic number, because the mean of its divisors is an integer number (4876993550).

Almost surely, 2^40505554431 is an apocalyptic number.

40505554431 is a deficient number, since it is larger than the sum of its proper divisors (18018368169).

40505554431 is a wasteful number, since it uses less digits than its factorization.

40505554431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223046 (or 1223043 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

The spelling of 40505554431 in words is "forty billion, five hundred five million, five hundred fifty-four thousand, four hundred thirty-one".