12042525661 has 4 divisors (see below), whose sum is σ = 12051783324. Its totient is φ = 12033268000.

The previous prime is 12042525659. The next prime is 12042525707. The reversal of 12042525661 is 16652524021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 172423161 + 11870102500 = 13131^2 + 108950^2 .

It is a cyclic number.

It is not a de Polignac number, because 12042525661 - 2¹ = 12042525659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12042525631) 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, 4626880 + ... + 4629481.

It is an arithmetic number, because the mean of its divisors is an integer number (3012945831).

Almost surely, 2^12042525661 is an apocalyptic number.

It is an amenable number.

12042525661 is a deficient number, since it is larger than the sum of its proper divisors (9257663).

12042525661 is an equidigital number, since it uses as much as digits as its factorization.

12042525661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9257662.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 12042525661 in words is "twelve billion, forty-two million, five hundred twenty-five thousand, six hundred sixty-one".