653868813785 has 16 divisors (see below), whose sum is σ = 859383991872. Its totient is φ = 473646360000.

The previous prime is 653868813739. The next prime is 653868813797. The reversal of 653868813785 is 587318868356.

It is a happy number.

It is not a de Polignac number, because 653868813785 - 2⁶ = 653868813721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23668514 + ... + 23696123.

It is an arithmetic number, because the mean of its divisors is an integer number (53711499492).

Almost surely, 2^653868813785 is an apocalyptic number.

It is an amenable number.

653868813785 is a deficient number, since it is larger than the sum of its proper divisors (205515178087).

653868813785 is a wasteful number, since it uses less digits than its factorization.

653868813785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47364904.

The product of its digits is 232243200, while the sum is 68.

The spelling of 653868813785 in words is "six hundred fifty-three billion, eight hundred sixty-eight million, eight hundred thirteen thousand, seven hundred eighty-five".