6491258880 has 240 divisors, whose sum is σ = 21160666464. Its totient is φ = 1698693120.

The previous prime is 6491258849. The next prime is 6491258911. The reversal of 6491258880 is 888521946.

It is an interprime number because it is at equal distance from previous prime (6491258849) and next prime (6491258911).

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14991144 + ... + 14991576.

Almost surely, 2^6491258880 is an apocalyptic number.

6491258880 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 6491258880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10580333232).

6491258880 is an abundant number, since it is smaller than the sum of its proper divisors (14669407584).

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

6491258880 is an equidigital number, since it uses as much as digits as its factorization.

6491258880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 51.

The square root of 6491258880 is about 80568.3491204828. The cubic root of 6491258880 is about 1865.4186306132.

The spelling of 6491258880 in words is "six billion, four hundred ninety-one million, two hundred fifty-eight thousand, eight hundred eighty".