2479988121409 has 4 divisors (see below), whose sum is σ = 2480116577620. Its totient is φ = 2479859665200.

The previous prime is 2479988121367. The next prime is 2479988121439. The reversal of 2479988121409 is 9041218899742.

2479988121409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1085132639809 + 1394855481600 = 1041697^2 + 1181040^2 .

It is a cyclic number.

It is not a de Polignac number, because 2479988121409 - 2²⁵ = 2479954566977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2479988121439) 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, 64199142 + ... + 64237759.

It is an arithmetic number, because the mean of its divisors is an integer number (620029144405).

Almost surely, 2^{2479988121409} is an apocalyptic number.

It is an amenable number.

2479988121409 is a deficient number, since it is larger than the sum of its proper divisors (128456211).

2479988121409 is a wasteful number, since it uses less digits than its factorization.

2479988121409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128456210.

The product of its (nonzero) digits is 20901888, while the sum is 64.

The spelling of 2479988121409 in words is "two trillion, four hundred seventy-nine billion, nine hundred eighty-eight million, one hundred twenty-one thousand, four hundred nine".