23155720327477 has 8 divisors (see below), whose sum is σ = 24048759043800. Its totient is φ = 22276745213184.

The previous prime is 23155720327451. The next prime is 23155720327507. The reversal of 23155720327477 is 77472302755132.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 533054771236 + 22622665556241 = 730106^2 + 4756329^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23155720327477 - 2²⁷ = 23155586109749 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 (23155720327417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3515897152 + ... + 3515903737.

It is an arithmetic number, because the mean of its divisors is an integer number (3006094880475).

Almost surely, 2^{23155720327477} is an apocalyptic number.

It is an amenable number.

23155720327477 is a deficient number, since it is larger than the sum of its proper divisors (893038716323).

23155720327477 is an equidigital number, since it uses as much as digits as its factorization.

23155720327477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7031801015.

The product of its (nonzero) digits is 17287200, while the sum is 55.

The spelling of 23155720327477 in words is "twenty-three trillion, one hundred fifty-five billion, seven hundred twenty million, three hundred twenty-seven thousand, four hundred seventy-seven".