40400011550 has 24 divisors (see below), whose sum is σ = 75150185616. Its totient is φ = 16158679040.

The previous prime is 40400011489. The next prime is 40400011559. The reversal of 40400011550 is 5511000404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400011559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 780062 + ... + 830238.

It is an arithmetic number, because the mean of its divisors is an integer number (3131257734).

Almost surely, 2^40400011550 is an apocalyptic number.

40400011550 is a deficient number, since it is larger than the sum of its proper divisors (34750174066).

40400011550 is a wasteful number, since it uses less digits than its factorization.

40400011550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66292 (or 66287 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 40400011550 its reverse (5511000404), we get a palindrome (45911011954).

The spelling of 40400011550 in words is "forty billion, four hundred million, eleven thousand, five hundred fifty".