2123178982459 has 4 divisors (see below), whose sum is σ = 2124606811104. Its totient is φ = 2121751153816.

The previous prime is 2123178982451. The next prime is 2123178982481. The reversal of 2123178982459 is 9542898713212.

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

It is a cyclic number.

It is not a de Polignac number, because 2123178982459 - 2³ = 2123178982451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123178982397 and 2123178982406.

It is not an unprimeable number, because it can be changed into a prime (2123178982451) 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, 713912092 + ... + 713915065.

It is an arithmetic number, because the mean of its divisors is an integer number (531151702776).

Almost surely, 2^{2123178982459} is an apocalyptic number.

2123178982459 is a deficient number, since it is larger than the sum of its proper divisors (1427828645).

2123178982459 is a wasteful number, since it uses less digits than its factorization.

2123178982459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427828644.

The product of its digits is 17418240, while the sum is 61.

The spelling of 2123178982459 in words is "two trillion, one hundred twenty-three billion, one hundred seventy-eight million, nine hundred eighty-two thousand, four hundred fifty-nine".