40405521550 has 24 divisors (see below), whose sum is σ = 75206342736. Its totient is φ = 16151010240.

The previous prime is 40405521547. The next prime is 40405521557. The reversal of 40405521550 is 5512550404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40405521557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206887 + ... + 351586.

It is an arithmetic number, because the mean of its divisors is an integer number (3133597614).

Almost surely, 2^40405521550 is an apocalyptic number.

40405521550 is a deficient number, since it is larger than the sum of its proper divisors (34800821186).

40405521550 is a wasteful number, since it uses less digits than its factorization.

40405521550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559932 (or 559927 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 31.

The spelling of 40405521550 in words is "forty billion, four hundred five million, five hundred twenty-one thousand, five hundred fifty".