15855777023 has 2 divisors, whose sum is σ = 15855777024. Its totient is φ = 15855777022.

The previous prime is 15855776983. The next prime is 15855777059. The reversal of 15855777023 is 32077755851.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15855777023 - 2¹² = 15855772927 is a prime.

It is a super-3 number, since 3×15855777023³ (a number of 32 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15855777083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7927888511 + 7927888512.

It is an arithmetic number, because the mean of its divisors is an integer number (7927888512).

Almost surely, 2^15855777023 is an apocalyptic number.

15855777023 is a deficient number, since it is larger than the sum of its proper divisors (1).

15855777023 is an equidigital number, since it uses as much as digits as its factorization.

15855777023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2058000, while the sum is 50.

The spelling of 15855777023 in words is "fifteen billion, eight hundred fifty-five million, seven hundred seventy-seven thousand, twenty-three".