649469272320 has 432 divisors, whose sum is σ = 2580406920000. Its totient is φ = 149159854080.

The previous prime is 649469272273. The next prime is 649469272337. The reversal of 649469272320 is 23272964946.

649469272320 is a `hidden beast` number, since 6 + 4 + 9 + 46 + 9 + 272 + 320 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2272806 + ... + 2542554.

Almost surely, 2^649469272320 is an apocalyptic number.

649469272320 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 649469272320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1290203460000).

649469272320 is an abundant number, since it is smaller than the sum of its proper divisors (1930937647680).

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

649469272320 is a wasteful number, since it uses less digits than its factorization.

649469272320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269806 (or 269789 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 54.

The spelling of 649469272320 in words is "six hundred forty-nine billion, four hundred sixty-nine million, two hundred seventy-two thousand, three hundred twenty".