63691604 has 12 divisors (see below), whose sum is σ = 112713300. Its totient is φ = 31487808.

The previous prime is 63691583. The next prime is 63691613. The reversal of 63691604 is 40619636.

It can be written as a sum of positive squares in 2 ways, for example, as 27667600 + 36024004 = 5260^2 + 6002^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89099 + ... + 89810.

It is an arithmetic number, because the mean of its divisors is an integer number (9392775).

Almost surely, 2^63691604 is an apocalyptic number.

It is an amenable number.

63691604 is a deficient number, since it is larger than the sum of its proper divisors (49021696).

63691604 is a wasteful number, since it uses less digits than its factorization.

63691604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179002 (or 179000 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 63691604 is about 7980.7019741374. The cubic root of 63691604 is about 399.3564735729.

The spelling of 63691604 in words is "sixty-three million, six hundred ninety-one thousand, six hundred four".