238698865653 has 4 divisors (see below), whose sum is σ = 318265154208. Its totient is φ = 159132577100.

The previous prime is 238698865607. The next prime is 238698865663. The reversal of 238698865653 is 356568896832.

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.

It is a cyclic number.

It is not a de Polignac number, because 238698865653 - 2²⁰ = 238697817077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238698865663) 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, 39783144273 + ... + 39783144278.

It is an arithmetic number, because the mean of its divisors is an integer number (79566288552).

Almost surely, 2^238698865653 is an apocalyptic number.

It is an amenable number.

238698865653 is a deficient number, since it is larger than the sum of its proper divisors (79566288555).

238698865653 is an equidigital number, since it uses as much as digits as its factorization.

238698865653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79566288554.

The product of its digits is 447897600, while the sum is 69.

The spelling of 238698865653 in words is "two hundred thirty-eight billion, six hundred ninety-eight million, eight hundred sixty-five thousand, six hundred fifty-three".