1161201625291 has 2 divisors, whose sum is σ = 1161201625292. Its totient is φ = 1161201625290.

The previous prime is 1161201625289. The next prime is 1161201625319. The reversal of 1161201625291 is 1925261021611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1161201625291 - 2¹ = 1161201625289 is a prime.

Together with 1161201625289, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1161201625291.

It is not a weakly prime, because it can be changed into another prime (1161201625211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580600812645 + 580600812646.

It is an arithmetic number, because the mean of its divisors is an integer number (580600812646).

Almost surely, 2^{1161201625291} is an apocalyptic number.

1161201625291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161201625291 is an equidigital number, since it uses as much as digits as its factorization.

1161201625291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 37.

The spelling of 1161201625291 in words is "one trillion, one hundred sixty-one billion, two hundred one million, six hundred twenty-five thousand, two hundred ninety-one".