297149264640 has 648 divisors, whose sum is σ = 1094899897728. Its totient is φ = 77217546240.

The previous prime is 297149264597. The next prime is 297149264641. The reversal of 297149264640 is 46462941792.

297149264640 is a `hidden beast` number, since 2 + 9 + 71 + 492 + 6 + 46 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (648).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (297149264641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 344320849 + ... + 344321711.

It is an arithmetic number, because the mean of its divisors is an integer number (1689660336).

Almost surely, 2^297149264640 is an apocalyptic number.

297149264640 is a gapful number since it is divisible by the number (20) 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 297149264640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547449948864).

297149264640 is an abundant number, since it is smaller than the sum of its proper divisors (797750633088).

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

297149264640 is an frugal number, since it uses more digits than its factorization.

297149264640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949 (or 914 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 297149264640 in words is "two hundred ninety-seven billion, one hundred forty-nine million, two hundred sixty-four thousand, six hundred forty".