12842554521261 has 32 divisors (see below), whose sum is σ = 18111895591680. Its totient is φ = 8078227520000.

The previous prime is 12842554521257. The next prime is 12842554521263. The reversal of 12842554521261 is 16212545524821.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12842554521261 - 2² = 12842554521257 is a prime.

It is a super-2 number, since 2×12842554521261² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12842554521261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12842554521263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1550640 + ... + 5299961.

It is an arithmetic number, because the mean of its divisors is an integer number (565996737240).

Almost surely, 2^{12842554521261} is an apocalyptic number.

It is an amenable number.

12842554521261 is a deficient number, since it is larger than the sum of its proper divisors (5269341070419).

12842554521261 is a wasteful number, since it uses less digits than its factorization.

12842554521261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6850997.

The product of its digits is 1536000, while the sum is 48.

The spelling of 12842554521261 in words is "twelve trillion, eight hundred forty-two billion, five hundred fifty-four million, five hundred twenty-one thousand, two hundred sixty-one".