11820961425257 has 4 divisors (see below), whose sum is σ = 11821131114576. Its totient is φ = 11820791735940.

The previous prime is 11820961425227. The next prime is 11820961425289. The reversal of 11820961425257 is 75252416902811.

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.

It is a cyclic number.

It is not a de Polignac number, because 11820961425257 - 2¹⁸ = 11820961163113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11820961425199 and 11820961425208.

It is not an unprimeable number, because it can be changed into a prime (11820961425227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84740123 + ... + 84879504.

It is an arithmetic number, because the mean of its divisors is an integer number (2955282778644).

Almost surely, 2^{11820961425257} is an apocalyptic number.

It is an amenable number.

11820961425257 is a deficient number, since it is larger than the sum of its proper divisors (169689319).

11820961425257 is an equidigital number, since it uses as much as digits as its factorization.

11820961425257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169689318.

The product of its (nonzero) digits is 2419200, while the sum is 53.

The spelling of 11820961425257 in words is "eleven trillion, eight hundred twenty billion, nine hundred sixty-one million, four hundred twenty-five thousand, two hundred fifty-seven".