63979416677 has 4 divisors (see below), whose sum is σ = 69795727296. Its totient is φ = 58163106060.

The previous prime is 63979416653. The next prime is 63979416713. The reversal of 63979416677 is 77661497936.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63979416677 - 2¹⁰ = 63979415653 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 (63979413677) 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, 2908155293 + ... + 2908155314.

It is an arithmetic number, because the mean of its divisors is an integer number (17448931824).

Almost surely, 2^63979416677 is an apocalyptic number.

It is an amenable number.

63979416677 is a deficient number, since it is larger than the sum of its proper divisors (5816310619).

63979416677 is a wasteful number, since it uses less digits than its factorization.

63979416677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5816310618.

The product of its digits is 72013536, while the sum is 65.

The spelling of 63979416677 in words is "sixty-three billion, nine hundred seventy-nine million, four hundred sixteen thousand, six hundred seventy-seven".