206991486545 has 8 divisors (see below), whose sum is σ = 248470474560. Its totient is φ = 165539395440.

The previous prime is 206991486539. The next prime is 206991486553. The reversal of 206991486545 is 545684199602.

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

It is not a de Polignac number, because 206991486545 - 2¹⁰ = 206991485521 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6707291 + ... + 6738080.

It is an arithmetic number, because the mean of its divisors is an integer number (31058809320).

Almost surely, 2^206991486545 is an apocalyptic number.

It is an amenable number.

206991486545 is a deficient number, since it is larger than the sum of its proper divisors (41478988015).

206991486545 is a wasteful number, since it uses less digits than its factorization.

206991486545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13448455.

The product of its (nonzero) digits is 18662400, while the sum is 59.

The spelling of 206991486545 in words is "two hundred six billion, nine hundred ninety-one million, four hundred eighty-six thousand, five hundred forty-five".