649091803400 has 96 divisors (see below), whose sum is σ = 1548591821280. Its totient is φ = 252870720000.

The previous prime is 649091803387. The next prime is 649091803421. The reversal of 649091803400 is 4308190946.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4745975 + ... + 4880825.

It is an arithmetic number, because the mean of its divisors is an integer number (16131164805).

Almost surely, 2^649091803400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649091803400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (774295910640).

649091803400 is an abundant number, since it is smaller than the sum of its proper divisors (899500017880).

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

649091803400 is a wasteful number, since it uses less digits than its factorization.

649091803400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135495 (or 135486 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 649091803400 in words is "six hundred forty-nine billion, ninety-one million, eight hundred three thousand, four hundred".