855634653 has 24 divisors (see below), whose sum is σ = 1244932416. Its totient is φ = 566280000.

The previous prime is 855634621. The next prime is 855634691. The reversal of 855634653 is 356436558.

855634653 is a `hidden beast` number, since 8 + 5 + 5 + 634 + 6 + 5 + 3 = 666.

It is not a de Polignac number, because 855634653 - 2⁵ = 855634621 is a prime.

It is a super-2 number, since 2×855634653² = 1464221318828860818, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 855634599 and 855634608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855634613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1176576 + ... + 1177302.

It is an arithmetic number, because the mean of its divisors is an integer number (51872184).

Almost surely, 2^855634653 is an apocalyptic number.

It is an amenable number.

855634653 is a deficient number, since it is larger than the sum of its proper divisors (389297763).

855634653 is a wasteful number, since it uses less digits than its factorization.

855634653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505 (or 1502 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The square root of 855634653 is about 29251.2333586124. The cubic root of 855634653 is about 949.3567771448.

The spelling of 855634653 in words is "eight hundred fifty-five million, six hundred thirty-four thousand, six hundred fifty-three".