12042519658 has 16 divisors (see below), whose sum is σ = 19481081256. Its totient is φ = 5550148800.

The previous prime is 12042519649. The next prime is 12042519667. The reversal of 12042519658 is 85691524021.

It is an interprime number because it is at equal distance from previous prime (12042519649) and next prime (12042519667).

It can be written as a sum of positive squares in 4 ways, for example, as 10640541409 + 1401978249 = 103153^2 + 37443^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312141 + ... + 348592.

Almost surely, 2^12042519658 is an apocalyptic number.

12042519658 is a deficient number, since it is larger than the sum of its proper divisors (7438561598).

12042519658 is a wasteful number, since it uses less digits than its factorization.

12042519658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661449.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 12042519658 in words is "twelve billion, forty-two million, five hundred nineteen thousand, six hundred fifty-eight".