63297440639 has 4 divisors (see below), whose sum is σ = 63476753856. Its totient is φ = 63118127424.

The previous prime is 63297440623. The next prime is 63297440641. The reversal of 63297440639 is 93604479236.

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

It is a cyclic number.

It is not a de Polignac number, because 63297440639 - 2⁴ = 63297440623 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 (63297440839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89656079 + ... + 89656784.

It is an arithmetic number, because the mean of its divisors is an integer number (15869188464).

Almost surely, 2^63297440639 is an apocalyptic number.

63297440639 is a deficient number, since it is larger than the sum of its proper divisors (179313217).

63297440639 is a wasteful number, since it uses less digits than its factorization.

63297440639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179313216.

The product of its (nonzero) digits is 5878656, while the sum is 53.

The spelling of 63297440639 in words is "sixty-three billion, two hundred ninety-seven million, four hundred forty thousand, six hundred thirty-nine".