636226726968 has 384 divisors, whose sum is σ = 2051488857600. Its totient is φ = 174356582400.

The previous prime is 636226726943. The next prime is 636226726997. The reversal of 636226726968 is 869627622636.

636226726968 is a `hidden beast` number, since 6 + 362 + 2 + 6 + 7 + 269 + 6 + 8 = 666.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 740659323 + ... + 740660181.

It is an arithmetic number, because the mean of its divisors is an integer number (5342418900).

Almost surely, 2^636226726968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636226726968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1025744428800).

636226726968 is an abundant number, since it is smaller than the sum of its proper divisors (1415262130632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

636226726968 is a wasteful number, since it uses less digits than its factorization.

636226726968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483 (or 1476 counting only the distinct ones).

The product of its digits is 94058496, while the sum is 63.

The spelling of 636226726968 in words is "six hundred thirty-six billion, two hundred twenty-six million, seven hundred twenty-six thousand, nine hundred sixty-eight".