206061600657 has 32 divisors (see below), whose sum is σ = 315620928000. Its totient is φ = 118267914240.

The previous prime is 206061600653. The next prime is 206061600671. The reversal of 206061600657 is 756006160602.

It is not a de Polignac number, because 206061600657 - 2² = 206061600653 is a prime.

It is a super-2 number, since 2×206061600657² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206061600653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1624894 + ... + 1747112.

It is an arithmetic number, because the mean of its divisors is an integer number (9863154000).

Almost surely, 2^206061600657 is an apocalyptic number.

It is an amenable number.

206061600657 is a deficient number, since it is larger than the sum of its proper divisors (109559327343).

206061600657 is a wasteful number, since it uses less digits than its factorization.

206061600657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124941.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 206061600657 in words is "two hundred six billion, sixty-one million, six hundred thousand, six hundred fifty-seven".