2109857749476 has 24 divisors (see below), whose sum is σ = 4956041697600. Its totient is φ = 698565876192.

The previous prime is 2109857749459. The next prime is 2109857749487. The reversal of 2109857749476 is 6749477589012.

It is a self number, because there is not a number n which added to its sum of digits gives 2109857749476.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590003176 + ... + 590006751.

It is an arithmetic number, because the mean of its divisors is an integer number (206501737400).

Almost surely, 2^{2109857749476} is an apocalyptic number.

It is an amenable number.

2109857749476 is an abundant number, since it is smaller than the sum of its proper divisors (2846183948124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2109857749476 is a wasteful number, since it uses less digits than its factorization.

2109857749476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180010083 (or 1180010081 counting only the distinct ones).

The product of its (nonzero) digits is 213373440, while the sum is 69.

The spelling of 2109857749476 in words is "two trillion, one hundred nine billion, eight hundred fifty-seven million, seven hundred forty-nine thousand, four hundred seventy-six".