12888740261566 has 8 divisors (see below), whose sum is σ = 20820272730264. Its totient is φ = 5948649351480.

The previous prime is 12888740261557. The next prime is 12888740261567. The reversal of 12888740261566 is 66516204788821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12888740261566² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12888740261498 and 12888740261507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12888740261567) 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, 247860389620 + ... + 247860389671.

It is an arithmetic number, because the mean of its divisors is an integer number (2602534091283).

Almost surely, 2^{12888740261566} is an apocalyptic number.

12888740261566 is a deficient number, since it is larger than the sum of its proper divisors (7931532468698).

12888740261566 is a wasteful number, since it uses less digits than its factorization.

12888740261566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495720779306.

The product of its (nonzero) digits is 61931520, while the sum is 64.

The spelling of 12888740261566 in words is "twelve trillion, eight hundred eighty-eight billion, seven hundred forty million, two hundred sixty-one thousand, five hundred sixty-six".