6986261551897 has 8 divisors (see below), whose sum is σ = 7350081370632. Its totient is φ = 6631652361600.

The previous prime is 6986261551889. The next prime is 6986261551981. The reversal of 6986261551897 is 7981551626896.

It can be written as a sum of positive squares in 4 ways, for example, as 1389720330496 + 5596541221401 = 1178864^2 + 2365701^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6986261551897 - 2³ = 6986261551889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6986261551817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2302655554 + ... + 2302658587.

It is an arithmetic number, because the mean of its divisors is an integer number (918760171329).

Almost surely, 2^{6986261551897} is an apocalyptic number.

It is an amenable number.

6986261551897 is a deficient number, since it is larger than the sum of its proper divisors (363819818735).

6986261551897 is a wasteful number, since it uses less digits than its factorization.

6986261551897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4605314219.

The product of its digits is 391910400, while the sum is 73.

The spelling of 6986261551897 in words is "six trillion, nine hundred eighty-six billion, two hundred sixty-one million, five hundred fifty-one thousand, eight hundred ninety-seven".