63729954979 has 4 divisors (see below), whose sum is σ = 63732917176. Its totient is φ = 63726992784.

The previous prime is 63729954829. The next prime is 63729955001. The reversal of 63729954979 is 97945992736.

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 63729954979 - 2²⁷ = 63595737251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63729954779) 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, 1448589 + ... + 1491934.

It is an arithmetic number, because the mean of its divisors is an integer number (15933229294).

Almost surely, 2^63729954979 is an apocalyptic number.

63729954979 is a deficient number, since it is larger than the sum of its proper divisors (2962197).

63729954979 is a wasteful number, since it uses less digits than its factorization.

63729954979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962196.

The product of its digits is 231472080, while the sum is 70.

The spelling of 63729954979 in words is "sixty-three billion, seven hundred twenty-nine million, nine hundred fifty-four thousand, nine hundred seventy-nine".