12550661442 has 48 divisors (see below), whose sum is σ = 30466979712. Its totient is φ = 3700438560.

The previous prime is 12550661429. The next prime is 12550661443. The reversal of 12550661442 is 24416605521.

12550661442 is a `hidden beast` number, since 1 + 2 + 5 + 506 + 6 + 144 + 2 = 666.

It is a super-3 number, since 3×12550661442³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12550661397 and 12550661406.

It is not an unprimeable number, because it can be changed into a prime (12550661443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 849258 + ... + 863909.

It is an arithmetic number, because the mean of its divisors is an integer number (634728744).

Almost surely, 2^12550661442 is an apocalyptic number.

12550661442 is an abundant number, since it is smaller than the sum of its proper divisors (17916318270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12550661442 is a wasteful number, since it uses less digits than its factorization.

12550661442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713223 (or 1713220 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 12550661442 in words is "twelve billion, five hundred fifty million, six hundred sixty-one thousand, four hundred forty-two".