636874051 has 8 divisors (see below), whose sum is σ = 695693808. Its totient is φ = 578208000.

The previous prime is 636874031. The next prime is 636874057. The reversal of 636874051 is 150478636.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 636874051 - 2¹⁷ = 636742979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 636873995 and 636874013.

It is not an unprimeable number, because it can be changed into a prime (636874057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29670 + ... + 46411.

It is an arithmetic number, because the mean of its divisors is an integer number (86961726).

Almost surely, 2^636874051 is an apocalyptic number.

636874051 is a deficient number, since it is larger than the sum of its proper divisors (58819757).

636874051 is a wasteful number, since it uses less digits than its factorization.

636874051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76853.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 636874051 is about 25236.3636643634. The cubic root of 636874051 is about 860.3685327851.

The spelling of 636874051 in words is "six hundred thirty-six million, eight hundred seventy-four thousand, fifty-one".