206931201855 has 16 divisors (see below), whose sum is σ = 378388483584. Its totient is φ = 94597120800.

The previous prime is 206931201821. The next prime is 206931201877. The reversal of 206931201855 is 558102139602.

It is not a de Polignac number, because 206931201855 - 2²⁸ = 206662766399 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 985386571 + ... + 985386780.

It is an arithmetic number, because the mean of its divisors is an integer number (23649280224).

Almost surely, 2^206931201855 is an apocalyptic number.

206931201855 is a deficient number, since it is larger than the sum of its proper divisors (171457281729).

206931201855 is a wasteful number, since it uses less digits than its factorization.

206931201855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970773366.

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 206931201855 in words is "two hundred six billion, nine hundred thirty-one million, two hundred one thousand, eight hundred fifty-five".