637487094361 has 4 divisors (see below), whose sum is σ = 686524563172. Its totient is φ = 588449625552.

The previous prime is 637487094359. The next prime is 637487094473. The reversal of 637487094361 is 163490784736.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 191269774336 + 446217320025 = 437344^2 + 667995^2 .

It is a cyclic number.

It is not a de Polignac number, because 637487094361 - 2¹ = 637487094359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 637487094296 and 637487094305.

It is not an unprimeable number, because it can be changed into a prime (637487095361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24518734386 + ... + 24518734411.

It is an arithmetic number, because the mean of its divisors is an integer number (171631140793).

Almost surely, 2^637487094361 is an apocalyptic number.

It is an amenable number.

637487094361 is a deficient number, since it is larger than the sum of its proper divisors (49037468811).

637487094361 is a wasteful number, since it uses less digits than its factorization.

637487094361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49037468810.

The product of its (nonzero) digits is 18289152, while the sum is 58.

The spelling of 637487094361 in words is "six hundred thirty-seven billion, four hundred eighty-seven million, ninety-four thousand, three hundred sixty-one".