206771370157 has 8 divisors (see below), whose sum is σ = 225601621920. Its totient is φ = 187946594160.

The previous prime is 206771370131. The next prime is 206771370257. The reversal of 206771370157 is 751073177602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206771370157 is a prime.

It is a super-2 number, since 2×206771370157² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206771370257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1289782 + ... + 1441207.

It is an arithmetic number, because the mean of its divisors is an integer number (28200202740).

Almost surely, 2^206771370157 is an apocalyptic number.

It is an amenable number.

206771370157 is a deficient number, since it is larger than the sum of its proper divisors (18830251763).

206771370157 is a wasteful number, since it uses less digits than its factorization.

206771370157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737883.

The product of its (nonzero) digits is 432180, while the sum is 46.

The spelling of 206771370157 in words is "two hundred six billion, seven hundred seventy-one million, three hundred seventy thousand, one hundred fifty-seven".