63091894761 has 81 divisors (see below), whose sum is σ = 110332381341. Its totient is φ = 35971128648.

The previous prime is 63091894699. The next prime is 63091894769. The reversal of 63091894761 is 16749819036.

The square root of 63091894761 is 251181.

It is a perfect power (a square), and thus also a powerful number.

63091894761 is a `hidden beast` number, since 6 + 3 + 0 + 91 + 89 + 476 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (81).

It is a de Polignac number, because none of the positive numbers 2^k-63091894761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63091894698 and 63091894707.

It is not an unprimeable number, because it can be changed into a prime (63091894769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 142419406 + ... + 142419848.

Almost surely, 2^63091894761 is an apocalyptic number.

63091894761 is the 251181-st square number.

63091894761 is the 125591-st centered octagonal number.

It is an amenable number.

63091894761 is a deficient number, since it is larger than the sum of its proper divisors (47240486580).

63091894761 is an frugal number, since it uses more digits than its factorization.

63091894761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 63091894761 in words is "sixty-three billion, ninety-one million, eight hundred ninety-four thousand, seven hundred sixty-one".