6739491998655 has 64 divisors (see below), whose sum is σ = 12917674600320. Its totient is φ = 3314119753728.

The previous prime is 6739491998641. The next prime is 6739491998663. The reversal of 6739491998655 is 5568991949376.

6739491998655 is a `hidden beast` number, since 6 + 7 + 39 + 491 + 9 + 98 + 6 + 5 + 5 = 666.

It is not a de Polignac number, because 6739491998655 - 2⁸ = 6739491998399 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 650242 + ... + 3728511.

It is an arithmetic number, because the mean of its divisors is an integer number (201838665630).

Almost surely, 2^{6739491998655} is an apocalyptic number.

6739491998655 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6739491998655 is a deficient number, since it is larger than the sum of its proper divisors (6178182601665).

6739491998655 is a wasteful number, since it uses less digits than its factorization.

6739491998655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4379657 (or 4379651 counting only the distinct ones).

The product of its digits is 3968092800, while the sum is 81.

The spelling of 6739491998655 in words is "six trillion, seven hundred thirty-nine billion, four hundred ninety-one million, nine hundred ninety-eight thousand, six hundred fifty-five".