1949315984251 has 2 divisors, whose sum is σ = 1949315984252. Its totient is φ = 1949315984250.

The previous prime is 1949315984191. The next prime is 1949315984279. The reversal of 1949315984251 is 1524895139491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1949315984251 - 2³¹ = 1947168500603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1949315984251.

It is not a weakly prime, because it can be changed into another prime (1949315084251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974657992125 + 974657992126.

It is an arithmetic number, because the mean of its divisors is an integer number (974657992126).

Almost surely, 2^{1949315984251} is an apocalyptic number.

1949315984251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1949315984251 is an equidigital number, since it uses as much as digits as its factorization.

1949315984251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13996800, while the sum is 61.

The spelling of 1949315984251 in words is "one trillion, nine hundred forty-nine billion, three hundred fifteen million, nine hundred eighty-four thousand, two hundred fifty-one".