2102763861 has 32 divisors (see below), whose sum is σ = 3401101440. Its totient is φ = 1273392000.

The previous prime is 2102763857. The next prime is 2102763899. The reversal of 2102763861 is 1683672012.

2102763861 is a `hidden beast` number, since 2 + 1 + 0 + 276 + 386 + 1 = 666.

It is not a de Polignac number, because 2102763861 - 2² = 2102763857 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102763811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 566311 + ... + 570011.

It is an arithmetic number, because the mean of its divisors is an integer number (106284420).

Almost surely, 2^2102763861 is an apocalyptic number.

It is an amenable number.

2102763861 is a deficient number, since it is larger than the sum of its proper divisors (1298337579).

2102763861 is a wasteful number, since it uses less digits than its factorization.

2102763861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5634 (or 5628 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 2102763861 is about 45855.9032295734. The cubic root of 2102763861 is about 1281.1407191474.

The spelling of 2102763861 in words is "two billion, one hundred two million, seven hundred sixty-three thousand, eight hundred sixty-one".