863988749937 has 28 divisors (see below), whose sum is σ = 1307274977140. Its totient is φ = 570708112608.

The previous prime is 863988749927. The next prime is 863988749963. The reversal of 863988749937 is 739947889368.

863988749937 is a `hidden beast` number, since 8 + 6 + 3 + 98 + 8 + 7 + 499 + 37 = 666.

863988749937 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 760181709456 + 103807040481 = 871884^2 + 322191^2 .

It is not a de Polignac number, because 863988749937 - 2²³ = 863980361329 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863988749917) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5357098 + ... + 5516019.

Almost surely, 2^863988749937 is an apocalyptic number.

It is an amenable number.

863988749937 is a deficient number, since it is larger than the sum of its proper divisors (443286227203).

863988749937 is a wasteful number, since it uses less digits than its factorization.

863988749937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10873244 (or 10873229 counting only the distinct ones).

The product of its digits is 3950456832, while the sum is 81.

The spelling of 863988749937 in words is "eight hundred sixty-three billion, nine hundred eighty-eight million, seven hundred forty-nine thousand, nine hundred thirty-seven".