426531620521 has 16 divisors (see below), whose sum is σ = 456392160000. Its totient is φ = 397455136848.

The previous prime is 426531620453. The next prime is 426531620533. The reversal of 426531620521 is 125026135624.

It is a cyclic number.

It is not a de Polignac number, because 426531620521 - 2¹¹ = 426531618473 is a prime.

It is a super-2 number, since 2×426531620521² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (426531620551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237771 + ... + 953728.

It is an arithmetic number, because the mean of its divisors is an integer number (28524510000).

Almost surely, 2^426531620521 is an apocalyptic number.

It is an amenable number.

426531620521 is a deficient number, since it is larger than the sum of its proper divisors (29860539479).

426531620521 is a wasteful number, since it uses less digits than its factorization.

426531620521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191828.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 426531620521 in words is "four hundred twenty-six billion, five hundred thirty-one million, six hundred twenty thousand, five hundred twenty-one".