63640541045 has 4 divisors (see below), whose sum is σ = 76368649260. Its totient is φ = 50912432832.

The previous prime is 63640541033. The next prime is 63640541047. The reversal of 63640541045 is 54014504636.

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 13944539569 + 49696001476 = 118087^2 + 222926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63640541045 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63640541047) 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, 6364054100 + ... + 6364054109.

It is an arithmetic number, because the mean of its divisors is an integer number (19092162315).

Almost surely, 2^63640541045 is an apocalyptic number.

It is an amenable number.

63640541045 is a deficient number, since it is larger than the sum of its proper divisors (12728108215).

63640541045 is a wasteful number, since it uses less digits than its factorization.

63640541045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12728108214.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 63640541045 in words is "sixty-three billion, six hundred forty million, five hundred forty-one thousand, forty-five".