63858120049 has 4 divisors (see below), whose sum is σ = 63949216500. Its totient is φ = 63767023600.

The previous prime is 63858120019. The next prime is 63858120097. The reversal of 63858120049 is 94002185836.

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 29788343649 + 34069776400 = 172593^2 + 184580^2 .

It is a cyclic number.

It is not a de Polignac number, because 63858120049 - 2⁹ = 63858119537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63858119990 and 63858120008.

It is not an unprimeable number, because it can be changed into a prime (63858120019) 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, 45547174 + ... + 45548575.

It is an arithmetic number, because the mean of its divisors is an integer number (15987304125).

Almost surely, 2^63858120049 is an apocalyptic number.

It is an amenable number.

63858120049 is a deficient number, since it is larger than the sum of its proper divisors (91096451).

63858120049 is an equidigital number, since it uses as much as digits as its factorization.

63858120049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91096450.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 63858120049 in words is "sixty-three billion, eight hundred fifty-eight million, one hundred twenty thousand, forty-nine".