2109857749486 has 8 divisors (see below), whose sum is σ = 3164809513320. Its totient is φ = 1054921245048.

The previous prime is 2109857749459. The next prime is 2109857749487. The reversal of 2109857749486 is 6849477589012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2109857749486² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109857749487) 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, 3462681 + ... + 4026148.

It is an arithmetic number, because the mean of its divisors is an integer number (395601189165).

Almost surely, 2^{2109857749486} is an apocalyptic number.

2109857749486 is a deficient number, since it is larger than the sum of its proper divisors (1054951763834).

2109857749486 is a wasteful number, since it uses less digits than its factorization.

2109857749486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7629698.

The product of its (nonzero) digits is 243855360, while the sum is 70.

The spelling of 2109857749486 in words is "two trillion, one hundred nine billion, eight hundred fifty-seven million, seven hundred forty-nine thousand, four hundred eighty-six".