861963000503 has 16 divisors (see below), whose sum is σ = 957545971200. Its totient is φ = 769361311680.

The previous prime is 861963000413. The next prime is 861963000527. The reversal of 861963000503 is 305000369168.

It is a cyclic number.

It is not a de Polignac number, because 861963000503 - 2⁸ = 861963000247 is a prime.

It is a super-2 number, since 2×861963000503² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861963000593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2615126 + ... + 2926227.

It is an arithmetic number, because the mean of its divisors is an integer number (59846623200).

Almost surely, 2^861963000503 is an apocalyptic number.

861963000503 is a deficient number, since it is larger than the sum of its proper divisors (95582970697).

861963000503 is a wasteful number, since it uses less digits than its factorization.

861963000503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5541622.

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 861963000503 in words is "eight hundred sixty-one billion, nine hundred sixty-three million, five hundred three", and thus it is an aban number.