11811450461 has 4 divisors (see below), whose sum is σ = 12192465024. Its totient is φ = 11430435900.

The previous prime is 11811450439. The next prime is 11811450473. The reversal of 11811450461 is 16405411811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16405411811 = 15331 ⋅1070081.

It is a cyclic number.

It is not a de Polignac number, because 11811450461 - 2¹⁰ = 11811449437 is a prime.

It is a super-2 number, since 2×11811450461² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11811450481) 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, 190507235 + ... + 190507296.

It is an arithmetic number, because the mean of its divisors is an integer number (3048116256).

Almost surely, 2^11811450461 is an apocalyptic number.

It is an amenable number.

11811450461 is a deficient number, since it is larger than the sum of its proper divisors (381014563).

11811450461 is an equidigital number, since it uses as much as digits as its factorization.

11811450461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381014562.

The product of its (nonzero) digits is 3840, while the sum is 32.

The spelling of 11811450461 in words is "eleven billion, eight hundred eleven million, four hundred fifty thousand, four hundred sixty-one".