646546653400 has 48 divisors (see below), whose sum is σ = 1516523862600. Its totient is φ = 256329991680.

The previous prime is 646546653373. The next prime is 646546653407. The reversal of 646546653400 is 4356645646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646546653407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14281530 + ... + 14326729.

Almost surely, 2^646546653400 is an apocalyptic number.

It is an amenable number.

646546653400 is an abundant number, since it is smaller than the sum of its proper divisors (869977209200).

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

646546653400 is a wasteful number, since it uses less digits than its factorization.

646546653400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28608388 (or 28608379 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 49.

The spelling of 646546653400 in words is "six hundred forty-six billion, five hundred forty-six million, six hundred fifty-three thousand, four hundred".