868671274653 has 72 divisors (see below), whose sum is σ = 1572147042648. Its totient is φ = 458122791168.

The previous prime is 868671274613. The next prime is 868671274661. The reversal of 868671274653 is 356472176868.

868671274653 is a `hidden beast` number, since 8 + 6 + 86 + 71 + 27 + 465 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11710053369 + 856961221284 = 108213^2 + 925722^2 .

It is not a de Polignac number, because 868671274653 - 2¹² = 868671270557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868671274613) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 53176875 + ... + 53193207.

Almost surely, 2^868671274653 is an apocalyptic number.

It is an amenable number.

868671274653 is a deficient number, since it is larger than the sum of its proper divisors (703475767995).

868671274653 is a wasteful number, since it uses less digits than its factorization.

868671274653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25643 (or 25633 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 63.

The spelling of 868671274653 in words is "eight hundred sixty-eight billion, six hundred seventy-one million, two hundred seventy-four thousand, six hundred fifty-three".