63694649636 has 6 divisors (see below), whose sum is σ = 111465636870. Its totient is φ = 31847324816.

The previous prime is 63694649609. The next prime is 63694649651.

It is a happy number.

63694649636 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 59465748736 + 4228900900 = 243856^2 + 65030^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7961831201 + ... + 7961831208.

It is an arithmetic number, because the mean of its divisors is an integer number (18577606145).

Almost surely, 2^63694649636 is an apocalyptic number.

It is an amenable number.

63694649636 is a deficient number, since it is larger than the sum of its proper divisors (47770987234).

63694649636 is a wasteful number, since it uses less digits than its factorization.

63694649636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15923662413 (or 15923662411 counting only the distinct ones).

The product of its digits is 90699264, while the sum is 62.

The spelling of 63694649636 in words is "sixty-three billion, six hundred ninety-four million, six hundred forty-nine thousand, six hundred thirty-six".