1161665625999 has 8 divisors (see below), whose sum is σ = 1548892875312. Its totient is φ = 774441063680.

The previous prime is 1161665625973. The next prime is 1161665626067. The reversal of 1161665625999 is 9995265661611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1161665625999 - 2⁹ = 1161665625487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161665625929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 793777 + ... + 1718549.

It is an arithmetic number, because the mean of its divisors is an integer number (193611609414).

Almost surely, 2^{1161665625999} is an apocalyptic number.

1161665625999 is a deficient number, since it is larger than the sum of its proper divisors (387227249313).

1161665625999 is an equidigital number, since it uses as much as digits as its factorization.

1161665625999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343497.

The product of its digits is 47239200, while the sum is 66.

The spelling of 1161665625999 in words is "one trillion, one hundred sixty-one billion, six hundred sixty-five million, six hundred twenty-five thousand, nine hundred ninety-nine".