1597880781619 has 2 divisors, whose sum is σ = 1597880781620. Its totient is φ = 1597880781618.

The previous prime is 1597880781617. The next prime is 1597880781661. The reversal of 1597880781619 is 9161870887951.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1597880781619 - 2¹ = 1597880781617 is a prime.

It is a super-2 number, since 2×1597880781619² (a number of 25 digits) contains 22 as substring.

Together with 1597880781617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1597880781617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 798940390809 + 798940390810.

It is an arithmetic number, because the mean of its divisors is an integer number (798940390810).

Almost surely, 2^{1597880781619} is an apocalyptic number.

1597880781619 is a deficient number, since it is larger than the sum of its proper divisors (1).

1597880781619 is an equidigital number, since it uses as much as digits as its factorization.

1597880781619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60963840, while the sum is 70.

The spelling of 1597880781619 in words is "one trillion, five hundred ninety-seven billion, eight hundred eighty million, seven hundred eighty-one thousand, six hundred nineteen".