63694531024 has 10 divisors (see below), whose sum is σ = 123408153890. Its totient is φ = 31847265504.

The previous prime is 63694530997. The next prime is 63694531099. The reversal of 63694531024 is 42013549636.

It can be written as a sum of positive squares in only one way, i.e., 48678479424 + 15016051600 = 220632^2 + 122540^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1990454079 + ... + 1990454110.

It is an arithmetic number, because the mean of its divisors is an integer number (12340815389).

Almost surely, 2^63694531024 is an apocalyptic number.

It is an amenable number.

63694531024 is a deficient number, since it is larger than the sum of its proper divisors (59713622866).

63694531024 is a wasteful number, since it uses less digits than its factorization.

63694531024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3980908197 (or 3980908191 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 63694531024 in words is "sixty-three billion, six hundred ninety-four million, five hundred thirty-one thousand, twenty-four".