12050510771555 has 4 divisors (see below), whose sum is σ = 14460612925872. Its totient is φ = 9640408617240.

The previous prime is 12050510771531. The next prime is 12050510771557. The reversal of 12050510771555 is 55517701505021.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-12050510771555 is a prime.

It is a super-3 number, since 3×12050510771555³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12050510771557) 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, 1205051077151 + ... + 1205051077160.

It is an arithmetic number, because the mean of its divisors is an integer number (3615153231468).

Almost surely, 2^{12050510771555} is an apocalyptic number.

12050510771555 is a deficient number, since it is larger than the sum of its proper divisors (2410102154317).

12050510771555 is an equidigital number, since it uses as much as digits as its factorization.

12050510771555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410102154316.

The product of its (nonzero) digits is 306250, while the sum is 44.

The spelling of 12050510771555 in words is "twelve trillion, fifty billion, five hundred ten million, seven hundred seventy-one thousand, five hundred fifty-five".