2105656345554 has 16 divisors (see below), whose sum is σ = 4219685088192. Its totient is φ = 700490049008.

The previous prime is 2105656345537. The next prime is 2105656345567. The reversal of 2105656345554 is 4555436565012.

It is a junction number, because it is equal to n+sod(n) for n = 2105656345497 and 2105656345506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348846609 + ... + 348852644.

It is an arithmetic number, because the mean of its divisors is an integer number (263730318012).

Almost surely, 2^{2105656345554} is an apocalyptic number.

2105656345554 is an abundant number, since it is smaller than the sum of its proper divisors (2114028742638).

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

2105656345554 is a wasteful number, since it uses less digits than its factorization.

2105656345554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697699761.

The product of its (nonzero) digits is 10800000, while the sum is 51.

The spelling of 2105656345554 in words is "two trillion, one hundred five billion, six hundred fifty-six million, three hundred forty-five thousand, five hundred fifty-four".