431764401897 has 24 divisors (see below), whose sum is σ = 641977716744. Its totient is φ = 279500442624.

The previous prime is 431764401869. The next prime is 431764401917. The reversal of 431764401897 is 798104467134.

It is a happy number.

431764401897 is a `hidden beast` number, since 4 + 3 + 17 + 6 + 440 + 189 + 7 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 60196131801 + 371568270096 = 245349^2 + 609564^2 .

It is not a de Polignac number, because 431764401897 - 2⁷ = 431764401769 is a prime.

It is a super-4 number, since 4×431764401897⁴ (a number of 48 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (431764402897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4619538 + ... + 4712075.

It is an arithmetic number, because the mean of its divisors is an integer number (26749071531).

Almost surely, 2^431764401897 is an apocalyptic number.

It is an amenable number.

431764401897 is a deficient number, since it is larger than the sum of its proper divisors (210213314847).

431764401897 is a wasteful number, since it uses less digits than its factorization.

431764401897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9331769 (or 9331766 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 431764401897 in words is "four hundred thirty-one billion, seven hundred sixty-four million, four hundred one thousand, eight hundred ninety-seven".