6498797631840 has 144 divisors (see below), whose sum is σ = 22273991485200. Its totient is φ = 1725444873216.

The previous prime is 6498797631839. The next prime is 6498797631841. The reversal of 6498797631840 is 481367978946.

6498797631840 is a `hidden beast` number, since 6 + 498 + 7 + 97 + 6 + 3 + 1 + 8 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (6498797631839) and next prime (6498797631841).

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6498797631841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9524070 + ... + 10183589.

It is an arithmetic number, because the mean of its divisors is an integer number (154680496425).

Almost surely, 2^{6498797631840} is an apocalyptic number.

6498797631840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6498797631840 is an abundant number, since it is smaller than the sum of its proper divisors (15775193853360).

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

6498797631840 is a wasteful number, since it uses less digits than its factorization.

6498797631840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19707909 (or 19707898 counting only the distinct ones).

The product of its (nonzero) digits is 438939648, while the sum is 72.

The spelling of 6498797631840 in words is "six trillion, four hundred ninety-eight billion, seven hundred ninety-seven million, six hundred thirty-one thousand, eight hundred forty".