14781878642961 has 12 divisors (see below), whose sum is σ = 21374389692292. Its totient is φ = 9844068589056.

The previous prime is 14781878642863. The next prime is 14781878642981. The reversal of 14781878642961 is 16924687818741.

14781878642961 is a `hidden beast` number, since 1 + 4 + 78 + 1 + 8 + 78 + 6 + 429 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8554782620736 + 6227096022225 = 2924856^2 + 2495415^2 .

It is not a de Polignac number, because 14781878642961 - 2¹¹ = 14781878640913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 14781878642961.

It is not an unprimeable number, because it can be changed into a prime (14781878642981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 876422176 + ... + 876439041.

Almost surely, 2^{14781878642961} is an apocalyptic number.

It is an amenable number.

14781878642961 is a deficient number, since it is larger than the sum of its proper divisors (6592511049331).

14781878642961 is a wasteful number, since it uses less digits than its factorization.

14781878642961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752862160 (or 1752862157 counting only the distinct ones).

The product of its digits is 260112384, while the sum is 72.

The spelling of 14781878642961 in words is "fourteen trillion, seven hundred eighty-one billion, eight hundred seventy-eight million, six hundred forty-two thousand, nine hundred sixty-one".