645733431246 has 8 divisors (see below), whose sum is σ = 1291466862504. Its totient is φ = 215244477080.

The previous prime is 645733431229. The next prime is 645733431257. The reversal of 645733431246 is 642134337546.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

645733431246 is an admirable number.

It is a super-2 number, since 2×645733431246² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645733431195 and 645733431204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53811119265 + ... + 53811119276.

It is an arithmetic number, because the mean of its divisors is an integer number (161433357813).

Almost surely, 2^645733431246 is an apocalyptic number.

645733431246 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

645733431246 is a wasteful number, since it uses less digits than its factorization.

645733431246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107622238546.

The product of its digits is 4354560, while the sum is 48.

The spelling of 645733431246 in words is "six hundred forty-five billion, seven hundred thirty-three million, four hundred thirty-one thousand, two hundred forty-six".