400416550389 has 8 divisors (see below), whose sum is σ = 593209704320. Its totient is φ = 266944366908.

The previous prime is 400416550381. The next prime is 400416550403. The reversal of 400416550389 is 983055614004.

400416550389 is a `hidden beast` number, since 4 + 0 + 0 + 4 + 1 + 65 + 503 + 89 = 666.

It is not a de Polignac number, because 400416550389 - 2³ = 400416550381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400416550381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7415121277 + ... + 7415121330.

It is an arithmetic number, because the mean of its divisors is an integer number (74151213040).

Almost surely, 2^400416550389 is an apocalyptic number.

It is an amenable number.

400416550389 is a deficient number, since it is larger than the sum of its proper divisors (192793153931).

400416550389 is a wasteful number, since it uses less digits than its factorization.

400416550389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14830242616 (or 14830242610 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 400416550389 in words is "four hundred billion, four hundred sixteen million, five hundred fifty thousand, three hundred eighty-nine".