14781878640887 has 2 divisors, whose sum is σ = 14781878640888. Its totient is φ = 14781878640886.

The previous prime is 14781878640833. The next prime is 14781878640913. The reversal of 14781878640887 is 78804687818741.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14781878640887 is a prime.

It is a super-2 number, since 2×14781878640887² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14781878640827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7390939320443 + 7390939320444.

It is an arithmetic number, because the mean of its divisors is an integer number (7390939320444).

Almost surely, 2^{14781878640887} is an apocalyptic number.

14781878640887 is a deficient number, since it is larger than the sum of its proper divisors (1).

14781878640887 is an equidigital number, since it uses as much as digits as its factorization.

14781878640887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1078984704, while the sum is 77.

The spelling of 14781878640887 in words is "fourteen trillion, seven hundred eighty-one billion, eight hundred seventy-eight million, six hundred forty thousand, eight hundred eighty-seven".