207172855355 has 4 divisors (see below), whose sum is σ = 248607426432. Its totient is φ = 165738284280.

The previous prime is 207172855303. The next prime is 207172855369. The reversal of 207172855355 is 553558271702.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-207172855355 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20717285531 + ... + 20717285540.

It is an arithmetic number, because the mean of its divisors is an integer number (62151856608).

Almost surely, 2^207172855355 is an apocalyptic number.

207172855355 is a deficient number, since it is larger than the sum of its proper divisors (41434571077).

207172855355 is an equidigital number, since it uses as much as digits as its factorization.

207172855355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41434571076.

The product of its (nonzero) digits is 2940000, while the sum is 50.

The spelling of 207172855355 in words is "two hundred seven billion, one hundred seventy-two million, eight hundred fifty-five thousand, three hundred fifty-five".