6497618400 has 864 divisors, whose sum is σ = 28936147968. Its totient is φ = 1335398400.

The previous prime is 6497618339. The next prime is 6497618401. The reversal of 6497618400 is 48167946.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6497618401) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 30794295 + ... + 30794505.

It is an arithmetic number, because the mean of its divisors is an integer number (33490912).

Almost surely, 2^6497618400 is an apocalyptic number.

6497618400 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 6497618400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14468073984).

6497618400 is an abundant number, since it is smaller than the sum of its proper divisors (22438529568).

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

6497618400 is a wasteful number, since it uses less digits than its factorization.

6497618400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 6497618400 is about 80607.8060736056. The cubic root of 6497618400 is about 1866.0276185502.

The spelling of 6497618400 in words is "six billion, four hundred ninety-seven million, six hundred eighteen thousand, four hundred".