405442431555 has 32 divisors (see below), whose sum is σ = 780400473600. Its totient is φ = 175590104832.

The previous prime is 405442431553. The next prime is 405442431613. The reversal of 405442431555 is 555134244504.

It is not a de Polignac number, because 405442431555 - 2¹ = 405442431553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405442431553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101612650 + ... + 101616639.

It is an arithmetic number, because the mean of its divisors is an integer number (24387514800).

Almost surely, 2^405442431555 is an apocalyptic number.

405442431555 is a deficient number, since it is larger than the sum of its proper divisors (374958042045).

405442431555 is a wasteful number, since it uses less digits than its factorization.

405442431555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203229323.

The product of its (nonzero) digits is 960000, while the sum is 42.

The spelling of 405442431555 in words is "four hundred five billion, four hundred forty-two million, four hundred thirty-one thousand, five hundred fifty-five".