42528776655389 has 4 divisors (see below), whose sum is σ = 43995286195260. Its totient is φ = 41062267115520.

The previous prime is 42528776655353. The next prime is 42528776655427. The reversal of 42528776655389 is 98355667782524.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33672545868025 + 8856230787364 = 5802805^2 + 2975942^2 .

It is a cyclic number.

It is not a de Polignac number, because 42528776655389 - 2⁸ = 42528776655133 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 (42528776655319) 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, 733254769892 + ... + 733254769949.

It is an arithmetic number, because the mean of its divisors is an integer number (10998821548815).

Almost surely, 2^{42528776655389} is an apocalyptic number.

It is an amenable number.

42528776655389 is a deficient number, since it is larger than the sum of its proper divisors (1466509539871).

42528776655389 is a wasteful number, since it uses less digits than its factorization.

42528776655389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466509539870.

The product of its digits is 6096384000, while the sum is 77.

The spelling of 42528776655389 in words is "forty-two trillion, five hundred twenty-eight billion, seven hundred seventy-six million, six hundred fifty-five thousand, three hundred eighty-nine".