1153165640461 has 4 divisors (see below), whose sum is σ = 1153402095132. Its totient is φ = 1152929185792.

The previous prime is 1153165640411. The next prime is 1153165640483. The reversal of 1153165640461 is 1640465613511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 723190364836 + 429975275625 = 850406^2 + 655725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1153165640461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153165640411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118220020 + ... + 118229773.

It is an arithmetic number, because the mean of its divisors is an integer number (288350523783).

Almost surely, 2^{1153165640461} is an apocalyptic number.

It is an amenable number.

1153165640461 is a deficient number, since it is larger than the sum of its proper divisors (236454671).

1153165640461 is an equidigital number, since it uses as much as digits as its factorization.

1153165640461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236454670.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 1153165640461 in words is "one trillion, one hundred fifty-three billion, one hundred sixty-five million, six hundred forty thousand, four hundred sixty-one".