658947749855 has 4 divisors (see below), whose sum is σ = 790737299832. Its totient is φ = 527158199880.

The previous prime is 658947749821. The next prime is 658947749857. The reversal of 658947749855 is 558947749856.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 658947749855 - 2¹² = 658947745759 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 (658947749857) 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, 65894774981 + ... + 65894774990.

It is an arithmetic number, because the mean of its divisors is an integer number (197684324958).

Almost surely, 2^658947749855 is an apocalyptic number.

658947749855 is a deficient number, since it is larger than the sum of its proper divisors (131789549977).

658947749855 is a wasteful number, since it uses less digits than its factorization.

658947749855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131789549976.

The product of its digits is 3048192000, while the sum is 77.

Subtracting from 658947749855 its reverse (558947749856), we obtain a palindrome (99999999999).

The spelling of 658947749855 in words is "six hundred fifty-eight billion, nine hundred forty-seven million, seven hundred forty-nine thousand, eight hundred fifty-five".