385531825551 has 4 divisors (see below), whose sum is σ = 514042434072. Its totient is φ = 257021217032.

The previous prime is 385531825519. The next prime is 385531825573. The reversal of 385531825551 is 155528135583.

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 385531825551 - 2⁵ = 385531825519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 385531825494 and 385531825503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385531826551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64255304256 + ... + 64255304261.

It is an arithmetic number, because the mean of its divisors is an integer number (128510608518).

Almost surely, 2^385531825551 is an apocalyptic number.

385531825551 is a deficient number, since it is larger than the sum of its proper divisors (128510608521).

385531825551 is a wasteful number, since it uses less digits than its factorization.

385531825551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128510608520.

The product of its digits is 3600000, while the sum is 51.

The spelling of 385531825551 in words is "three hundred eighty-five billion, five hundred thirty-one million, eight hundred twenty-five thousand, five hundred fifty-one".