23355497779 has 4 divisors (see below), whose sum is σ = 23356199160. Its totient is φ = 23354796400.

The previous prime is 23355497771. The next prime is 23355497791. The reversal of 23355497779 is 97779455332.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 23355497779 - 2³ = 23355497771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23355497771) 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, 298114 + ... + 368215.

It is an arithmetic number, because the mean of its divisors is an integer number (5839049790).

Almost surely, 2^23355497779 is an apocalyptic number.

23355497779 is a deficient number, since it is larger than the sum of its proper divisors (701381).

23355497779 is an equidigital number, since it uses as much as digits as its factorization.

23355497779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701380.

The product of its digits is 50009400, while the sum is 61.

The spelling of 23355497779 in words is "twenty-three billion, three hundred fifty-five million, four hundred ninety-seven thousand, seven hundred seventy-nine".