1161115064251 has 4 divisors (see below), whose sum is σ = 1192496552512. Its totient is φ = 1129733575992.

The previous prime is 1161115064189. The next prime is 1161115064279. The reversal of 1161115064251 is 1524605111611.

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

It is a cyclic number.

It is not a de Polignac number, because 1161115064251 - 2¹¹ = 1161115062203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161115061251) 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, 15690744075 + ... + 15690744148.

It is an arithmetic number, because the mean of its divisors is an integer number (298124138128).

Almost surely, 2^{1161115064251} is an apocalyptic number.

1161115064251 is a deficient number, since it is larger than the sum of its proper divisors (31381488261).

1161115064251 is an equidigital number, since it uses as much as digits as its factorization.

1161115064251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31381488260.

The product of its (nonzero) digits is 7200, while the sum is 34.

The spelling of 1161115064251 in words is "one trillion, one hundred sixty-one billion, one hundred fifteen million, sixty-four thousand, two hundred fifty-one".