11545456261 has 2 divisors, whose sum is σ = 11545456262. Its totient is φ = 11545456260.

The previous prime is 11545456259. The next prime is 11545456339. The reversal of 11545456261 is 16265454511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6182676900 + 5362779361 = 78630^2 + 73231^2 .

It is a cyclic number.

It is not a de Polignac number, because 11545456261 - 2¹ = 11545456259 is a prime.

Together with 11545456259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11545456961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5772728130 + 5772728131.

It is an arithmetic number, because the mean of its divisors is an integer number (5772728131).

Almost surely, 2^11545456261 is an apocalyptic number.

It is an amenable number.

11545456261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11545456261 is an equidigital number, since it uses as much as digits as its factorization.

11545456261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144000, while the sum is 40.

The spelling of 11545456261 in words is "eleven billion, five hundred forty-five million, four hundred fifty-six thousand, two hundred sixty-one".