63971701699 has 4 divisors (see below), whose sum is σ = 65459415736. Its totient is φ = 62483987664.

The previous prime is 63971701691. The next prime is 63971701733. The reversal of 63971701699 is 99610717936.

63971701699 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 63971701699 - 2³ = 63971701691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63971701691) 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, 743856954 + ... + 743857039.

It is an arithmetic number, because the mean of its divisors is an integer number (16364853934).

Almost surely, 2^63971701699 is an apocalyptic number.

63971701699 is a deficient number, since it is larger than the sum of its proper divisors (1487714037).

63971701699 is a wasteful number, since it uses less digits than its factorization.

63971701699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487714036.

The product of its (nonzero) digits is 3857868, while the sum is 58.

The spelling of 63971701699 in words is "sixty-three billion, nine hundred seventy-one million, seven hundred one thousand, six hundred ninety-nine".