649972989600 has 648 divisors, whose sum is σ = 2431558182816. Its totient is φ = 150682752000.

The previous prime is 649972989587. The next prime is 649972989613. The reversal of 649972989600 is 6989279946.

649972989600 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (649972989587) and next prime (649972989613).

It is a Harshad number since it is a multiple of its sum of digits (69).

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 153619485 + ... + 153623715.

Almost surely, 2^649972989600 is an apocalyptic number.

649972989600 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649972989600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1215779091408).

649972989600 is an abundant number, since it is smaller than the sum of its proper divisors (1781585193216).

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

649972989600 is a wasteful number, since it uses less digits than its factorization.

649972989600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4322 (or 4275 counting only the distinct ones).

The product of its (nonzero) digits is 105815808, while the sum is 69.

The spelling of 649972989600 in words is "six hundred forty-nine billion, nine hundred seventy-two million, nine hundred eighty-nine thousand, six hundred".