63461827891 has 8 divisors (see below), whose sum is σ = 79121240064. Its totient is φ = 49450774920.

The previous prime is 63461827843. The next prime is 63461827903. The reversal of 63461827891 is 19872816436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63461827891 - 2⁹ = 63461827379 is a prime.

It is a super-3 number, since 3×63461827891³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63461825891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412089715 + ... + 412089868.

It is an arithmetic number, because the mean of its divisors is an integer number (9890155008).

Almost surely, 2^63461827891 is an apocalyptic number.

63461827891 is a deficient number, since it is larger than the sum of its proper divisors (15659412173).

63461827891 is a wasteful number, since it uses less digits than its factorization.

63461827891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824179601.

The product of its digits is 3483648, while the sum is 55.

The spelling of 63461827891 in words is "sixty-three billion, four hundred sixty-one million, eight hundred twenty-seven thousand, eight hundred ninety-one".