675640868551 has 36 divisors (see below), whose sum is σ = 820737184176. Its totient is φ = 552807840640.

The previous prime is 675640868527. The next prime is 675640868569. The reversal of 675640868551 is 155868046576.

It is not a de Polignac number, because 675640868551 - 2⁷ = 675640868423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 675640868551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (675640868501) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 178786380 + ... + 178790158.

It is an arithmetic number, because the mean of its divisors is an integer number (22798255116).

Almost surely, 2^675640868551 is an apocalyptic number.

675640868551 is a deficient number, since it is larger than the sum of its proper divisors (145096315625).

675640868551 is an equidigital number, since it uses as much as digits as its factorization.

675640868551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7620 (or 3830 counting only the distinct ones).

The product of its (nonzero) digits is 48384000, while the sum is 61.

The spelling of 675640868551 in words is "six hundred seventy-five billion, six hundred forty million, eight hundred sixty-eight thousand, five hundred fifty-one".