1161120400065 has 96 divisors (see below), whose sum is σ = 2202295979520. Its totient is φ = 564078670848.

The previous prime is 1161120400039. The next prime is 1161120400103. The reversal of 1161120400065 is 5600040211611.

1161120400065 is a `hidden beast` number, since 1 + 1 + 611 + 2 + 0 + 40 + 0 + 0 + 6 + 5 = 666.

It is not a de Polignac number, because 1161120400065 - 2⁸ = 1161120399809 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1926132 + ... + 2456058.

It is an arithmetic number, because the mean of its divisors is an integer number (22940583120).

Almost surely, 2^{1161120400065} is an apocalyptic number.

1161120400065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1161120400065 is a deficient number, since it is larger than the sum of its proper divisors (1041175579455).

1161120400065 is a wasteful number, since it uses less digits than its factorization.

1161120400065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530063 (or 530060 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 1161120400065 its reverse (5600040211611), we get a palindrome (6761160611676).

The spelling of 1161120400065 in words is "one trillion, one hundred sixty-one billion, one hundred twenty million, four hundred thousand, sixty-five".