526642342921 has 4 divisors (see below), whose sum is σ = 538889839312. Its totient is φ = 514394846532.

The previous prime is 526642342883. The next prime is 526642342943. The reversal of 526642342921 is 129243246625.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 526642342921 - 2⁹ = 526642342409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (526642349921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6123748131 + ... + 6123748216.

It is an arithmetic number, because the mean of its divisors is an integer number (134722459828).

Almost surely, 2^526642342921 is an apocalyptic number.

It is an amenable number.

526642342921 is a deficient number, since it is larger than the sum of its proper divisors (12247496391).

526642342921 is a wasteful number, since it uses less digits than its factorization.

526642342921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12247496390.

The product of its digits is 1244160, while the sum is 46.

The spelling of 526642342921 in words is "five hundred twenty-six billion, six hundred forty-two million, three hundred forty-two thousand, nine hundred twenty-one".