2278651668451 has 2 divisors, whose sum is σ = 2278651668452. Its totient is φ = 2278651668450.

The previous prime is 2278651668413. The next prime is 2278651668493. The reversal of 2278651668451 is 1548661568722.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2278651668451 - 2⁷ = 2278651668323 is a prime.

It is a super-2 number, since 2×2278651668451² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2278651668451.

It is not a weakly prime, because it can be changed into another prime (2278651663451) 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 as a sum of consecutive naturals, namely, 1139325834225 + 1139325834226.

It is an arithmetic number, because the mean of its divisors is an integer number (1139325834226).

Almost surely, 2^{2278651668451} is an apocalyptic number.

2278651668451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2278651668451 is an equidigital number, since it uses as much as digits as its factorization.

2278651668451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38707200, while the sum is 61.

The spelling of 2278651668451 in words is "two trillion, two hundred seventy-eight billion, six hundred fifty-one million, six hundred sixty-eight thousand, four hundred fifty-one".