636376370749 has 16 divisors (see below), whose sum is σ = 728291243520. Its totient is φ = 544712837760.

The previous prime is 636376370627. The next prime is 636376370761. The reversal of 636376370749 is 947073673636.

It is a happy number.

It is not a de Polignac number, because 636376370749 - 2¹⁵ = 636376337981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636376370779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26471667 + ... + 26495695.

It is an arithmetic number, because the mean of its divisors is an integer number (45518202720).

Almost surely, 2^636376370749 is an apocalyptic number.

It is an amenable number.

636376370749 is a deficient number, since it is larger than the sum of its proper divisors (91914872771).

636376370749 is a wasteful number, since it uses less digits than its factorization.

636376370749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29100.

The product of its (nonzero) digits is 72013536, while the sum is 61.

The spelling of 636376370749 in words is "six hundred thirty-six billion, three hundred seventy-six million, three hundred seventy thousand, seven hundred forty-nine".