1420778656259 has 2 divisors, whose sum is σ = 1420778656260. Its totient is φ = 1420778656258.

The previous prime is 1420778656243. The next prime is 1420778656321. The reversal of 1420778656259 is 9526568770241.

It is an a-pointer prime, because the next prime (1420778656321) can be obtained adding 1420778656259 to its sum of digits (62).

It is a weak prime.

It is an emirp because it is prime and its reverse (9526568770241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1420778656259 - 2⁴ = 1420778656243 is a prime.

It is a super-2 number, since 2×1420778656259² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1420778686259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710389328129 + 710389328130.

It is an arithmetic number, because the mean of its divisors is an integer number (710389328130).

Almost surely, 2^{1420778656259} is an apocalyptic number.

1420778656259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420778656259 is an equidigital number, since it uses as much as digits as its factorization.

1420778656259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50803200, while the sum is 62.

The spelling of 1420778656259 in words is "one trillion, four hundred twenty billion, seven hundred seventy-eight million, six hundred fifty-six thousand, two hundred fifty-nine".