84408738653 has 4 divisors (see below), whose sum is σ = 84409385280. Its totient is φ = 84408092028.

The previous prime is 84408738641. The next prime is 84408738737. The reversal of 84408738653 is 35683780448.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 84408738653 - 2¹⁰ = 84408737629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84408738613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51125 + ... + 414042.

It is an arithmetic number, because the mean of its divisors is an integer number (21102346320).

Almost surely, 2^84408738653 is an apocalyptic number.

It is an amenable number.

84408738653 is a deficient number, since it is larger than the sum of its proper divisors (646627).

84408738653 is a wasteful number, since it uses less digits than its factorization.

84408738653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646626.

The product of its (nonzero) digits is 15482880, while the sum is 56.

The spelling of 84408738653 in words is "eighty-four billion, four hundred eight million, seven hundred thirty-eight thousand, six hundred fifty-three".