431641649240 has 64 divisors (see below), whose sum is σ = 997599663360. Its totient is φ = 167963742720.

The previous prime is 431641649237. The next prime is 431641649249. The reversal of 431641649240 is 42946146134.

It is a junction number, because it is equal to n+sod(n) for n = 431641649191 and 431641649200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431641649249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11203610 + ... + 11242070.

It is an arithmetic number, because the mean of its divisors is an integer number (15587494740).

Almost surely, 2^431641649240 is an apocalyptic number.

431641649240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

431641649240 is an abundant number, since it is smaller than the sum of its proper divisors (565958014120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

431641649240 is a wasteful number, since it uses less digits than its factorization.

431641649240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46092 (or 46088 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 431641649240 in words is "four hundred thirty-one billion, six hundred forty-one million, six hundred forty-nine thousand, two hundred forty".