2105515656042 has 8 divisors (see below), whose sum is σ = 4211031312096. Its totient is φ = 701838552012.

The previous prime is 2105515656029. The next prime is 2105515656067. The reversal of 2105515656042 is 2406565155012.

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

2105515656042 is an admirable number.

It is a super-2 number, since 2×2105515656042² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2105515655985 and 2105515656003.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175459637998 + ... + 175459638009.

It is an arithmetic number, because the mean of its divisors is an integer number (526378914012).

Almost surely, 2^{2105515656042} is an apocalyptic number.

2105515656042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2105515656042 is a wasteful number, since it uses less digits than its factorization.

2105515656042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350919276012.

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 2105515656042 in words is "two trillion, one hundred five billion, five hundred fifteen million, six hundred fifty-six thousand, forty-two".