2100726863828 has 6 divisors (see below), whose sum is σ = 3676272011706. Its totient is φ = 1050363431912.

The previous prime is 2100726863819. The next prime is 2100726863857. The reversal of 2100726863828 is 8283686270012.

It can be written as a sum of positive squares in only one way, i.e., 1143299839504 + 957427024324 = 1069252^2 + 978482^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2100726863828.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262590857975 + ... + 262590857982.

It is an arithmetic number, because the mean of its divisors is an integer number (612712001951).

Almost surely, 2^{2100726863828} is an apocalyptic number.

It is an amenable number.

2100726863828 is a deficient number, since it is larger than the sum of its proper divisors (1575545147878).

2100726863828 is a wasteful number, since it uses less digits than its factorization.

2100726863828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525181715961 (or 525181715959 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 53.

The spelling of 2100726863828 in words is "two trillion, one hundred billion, seven hundred twenty-six million, eight hundred sixty-three thousand, eight hundred twenty-eight".