636426990122 has 32 divisors (see below), whose sum is σ = 1190242529280. Its totient is φ = 247949941680.

The previous prime is 636426990119. The next prime is 636426990191. The reversal of 636426990122 is 221099624636.

It is a super-3 number, since 3×636426990122³ (a number of 36 digits) contains 333 as substring.

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, 6064703 + ... + 6168749.

It is an arithmetic number, because the mean of its divisors is an integer number (37195079040).

Almost surely, 2^636426990122 is an apocalyptic number.

636426990122 is a deficient number, since it is larger than the sum of its proper divisors (553815539158).

636426990122 is a wasteful number, since it uses less digits than its factorization.

636426990122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143786.

The product of its (nonzero) digits is 1679616, while the sum is 50.

The spelling of 636426990122 in words is "six hundred thirty-six billion, four hundred twenty-six million, nine hundred ninety thousand, one hundred twenty-two".