1591455197968 has 10 divisors (see below), whose sum is σ = 3083444446094. Its totient is φ = 795727598976.

The previous prime is 1591455197933. The next prime is 1591455197977. The reversal of 1591455197968 is 8697915541951.

It can be written as a sum of positive squares in only one way, i.e., 929041521424 + 662413676544 = 963868^2 + 813888^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1591455197897 and 1591455197906.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49732974921 + ... + 49732974952.

Almost surely, 2^{1591455197968} is an apocalyptic number.

It is an amenable number.

1591455197968 is a deficient number, since it is larger than the sum of its proper divisors (1491989248126).

1591455197968 is an equidigital number, since it uses as much as digits as its factorization.

1591455197968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99465949881 (or 99465949875 counting only the distinct ones).

The product of its digits is 122472000, while the sum is 70.

The spelling of 1591455197968 in words is "one trillion, five hundred ninety-one billion, four hundred fifty-five million, one hundred ninety-seven thousand, nine hundred sixty-eight".