63640763543 has 8 divisors (see below), whose sum is σ = 72745239840. Its totient is φ = 54539521920.

The previous prime is 63640763479. The next prime is 63640763611. The reversal of 63640763543 is 34536704636.

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 63640763543 - 2⁶ = 63640763479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63640763143) 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, 766358 + ... + 845331.

It is an arithmetic number, because the mean of its divisors is an integer number (9093154980).

Almost surely, 2^63640763543 is an apocalyptic number.

63640763543 is a deficient number, since it is larger than the sum of its proper divisors (9104476297).

63640763543 is a wasteful number, since it uses less digits than its factorization.

63640763543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617337.

The product of its (nonzero) digits is 3265920, while the sum is 47.

The spelling of 63640763543 in words is "sixty-three billion, six hundred forty million, seven hundred sixty-three thousand, five hundred forty-three".