63971928074 has 4 divisors (see below), whose sum is σ = 95957892114. Its totient is φ = 31985964036.

The previous prime is 63971928049. The next prime is 63971928121. The reversal of 63971928074 is 47082917936.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 38727484849 + 25244443225 = 196793^2 + 158885^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15992982017 + ... + 15992982020.

Almost surely, 2^63971928074 is an apocalyptic number.

63971928074 is a deficient number, since it is larger than the sum of its proper divisors (31985964040).

63971928074 is a wasteful number, since it uses less digits than its factorization.

63971928074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31985964039.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 63971928074 in words is "sixty-three billion, nine hundred seventy-one million, nine hundred twenty-eight thousand, seventy-four".