12542064661 has 8 divisors (see below), whose sum is σ = 14796168704. Its totient is φ = 10403555760.

The previous prime is 12542064649. The next prime is 12542064683. The reversal of 12542064661 is 16646024521.

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

It is a cyclic number.

It is not a de Polignac number, because 12542064661 - 2¹⁵ = 12542031893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12542064661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12542064461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28898550 + ... + 28898983.

It is an arithmetic number, because the mean of its divisors is an integer number (1849521088).

Almost surely, 2^12542064661 is an apocalyptic number.

It is an amenable number.

12542064661 is a deficient number, since it is larger than the sum of its proper divisors (2254104043).

12542064661 is an equidigital number, since it uses as much as digits as its factorization.

12542064661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57797571.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 12542064661 in words is "twelve billion, five hundred forty-two million, sixty-four thousand, six hundred sixty-one".