63654455197 has 4 divisors (see below), whose sum is σ = 65374845916. Its totient is φ = 61934064480.

The previous prime is 63654455171. The next prime is 63654455203. The reversal of 63654455197 is 79155445636.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54852450436 + 8802004761 = 234206^2 + 93819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63654455197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63654455107) 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, 860195304 + ... + 860195377.

It is an arithmetic number, because the mean of its divisors is an integer number (16343711479).

Almost surely, 2^63654455197 is an apocalyptic number.

It is an amenable number.

63654455197 is a deficient number, since it is larger than the sum of its proper divisors (1720390719).

63654455197 is a wasteful number, since it uses less digits than its factorization.

63654455197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720390718.

The product of its digits is 13608000, while the sum is 55.

The spelling of 63654455197 in words is "sixty-three billion, six hundred fifty-four million, four hundred fifty-five thousand, one hundred ninety-seven".