206635631426 has 32 divisors (see below), whose sum is σ = 359297482752. Its totient is φ = 87292411920.

The previous prime is 206635631413. The next prime is 206635631549. The reversal of 206635631426 is 624136536602.

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, 5355335 + ... + 5393781.

It is an arithmetic number, because the mean of its divisors is an integer number (11228046336).

Almost surely, 2^206635631426 is an apocalyptic number.

206635631426 is a deficient number, since it is larger than the sum of its proper divisors (152661851326).

206635631426 is a wasteful number, since it uses less digits than its factorization.

206635631426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43934.

The product of its (nonzero) digits is 933120, while the sum is 44.

The spelling of 206635631426 in words is "two hundred six billion, six hundred thirty-five million, six hundred thirty-one thousand, four hundred twenty-six".