63115979947 has 4 divisors (see below), whose sum is σ = 63117217816. Its totient is φ = 63114742080.

The previous prime is 63115979923. The next prime is 63115979959. The reversal of 63115979947 is 74997951136.

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 63115979947 - 2³¹ = 60968496299 is a prime.

It is a super-3 number, since 3×63115979947³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63115979347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539013 + ... + 645574.

It is an arithmetic number, because the mean of its divisors is an integer number (15779304454).

Almost surely, 2^63115979947 is an apocalyptic number.

63115979947 is a deficient number, since it is larger than the sum of its proper divisors (1237869).

63115979947 is a wasteful number, since it uses less digits than its factorization.

63115979947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237868.

The product of its digits is 12859560, while the sum is 61.

The spelling of 63115979947 in words is "sixty-three billion, one hundred fifteen million, nine hundred seventy-nine thousand, nine hundred forty-seven".