63394899729 has 16 divisors (see below), whose sum is σ = 97141432320. Its totient is φ = 36023276880.

The previous prime is 63394899727. The next prime is 63394899739. The reversal of 63394899729 is 92799849336.

It is not a de Polignac number, because 63394899729 - 2¹ = 63394899727 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63394899727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8428657 + ... + 8436174.

It is an arithmetic number, because the mean of its divisors is an integer number (6071339520).

Almost surely, 2^63394899729 is an apocalyptic number.

It is an amenable number.

63394899729 is a deficient number, since it is larger than the sum of its proper divisors (33746532591).

63394899729 is a wasteful number, since it uses less digits than its factorization.

63394899729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16865020.

The product of its digits is 158723712, while the sum is 69.

The spelling of 63394899729 in words is "sixty-three billion, three hundred ninety-four million, eight hundred ninety-nine thousand, seven hundred twenty-nine".