637105542389 has 2 divisors, whose sum is σ = 637105542390. Its totient is φ = 637105542388.

The previous prime is 637105542377. The next prime is 637105542413. The reversal of 637105542389 is 983245501736.

It is a happy number.

637105542389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 406929168100 + 230176374289 = 637910^2 + 479767^2 .

It is a cyclic number.

It is not a de Polignac number, because 637105542389 - 2¹⁶ = 637105476853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 637105542389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (637105545389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318552771194 + 318552771195.

It is an arithmetic number, because the mean of its divisors is an integer number (318552771195).

It is a 1-persistent number, because it is pandigital, but 2⋅637105542389 = 1274211084778 is not.

Almost surely, 2^637105542389 is an apocalyptic number.

It is an amenable number.

637105542389 is a deficient number, since it is larger than the sum of its proper divisors (1).

637105542389 is an equidigital number, since it uses as much as digits as its factorization.

637105542389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5443200, while the sum is 53.

The spelling of 637105542389 in words is "six hundred thirty-seven billion, one hundred five million, five hundred forty-two thousand, three hundred eighty-nine".