63834043261 has 4 divisors (see below), whose sum is σ = 63834782752. Its totient is φ = 63833303772.

The previous prime is 63834043243. The next prime is 63834043267. The reversal of 63834043261 is 16234043836.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63834043261 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 (63834043267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220065 + ... + 419638.

It is an arithmetic number, because the mean of its divisors is an integer number (15958695688).

Almost surely, 2^63834043261 is an apocalyptic number.

It is an amenable number.

63834043261 is a deficient number, since it is larger than the sum of its proper divisors (739491).

63834043261 is an equidigital number, since it uses as much as digits as its factorization.

63834043261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739490.

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 63834043261 in words is "sixty-three billion, eight hundred thirty-four million, forty-three thousand, two hundred sixty-one".