1951579453819 has 2 divisors, whose sum is σ = 1951579453820. Its totient is φ = 1951579453818.

The previous prime is 1951579453801. The next prime is 1951579453829. The reversal of 1951579453819 is 9183549751591.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1951579453819 is a prime.

It is a super-2 number, since 2×1951579453819² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1951579453829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975789726909 + 975789726910.

It is an arithmetic number, because the mean of its divisors is an integer number (975789726910).

Almost surely, 2^{1951579453819} is an apocalyptic number.

1951579453819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1951579453819 is an equidigital number, since it uses as much as digits as its factorization.

1951579453819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236000, while the sum is 67.

The spelling of 1951579453819 in words is "one trillion, nine hundred fifty-one billion, five hundred seventy-nine million, four hundred fifty-three thousand, eight hundred nineteen".