426440434261 has 4 divisors (see below), whose sum is σ = 426461048992. Its totient is φ = 426419819532.

The previous prime is 426440434151. The next prime is 426440434307. The reversal of 426440434261 is 162434044624.

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 a de Polignac number, because none of the positive numbers 2^k-426440434261 is a prime.

It is a super-2 number, since 2×426440434261² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426440434561) 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, 10276305 + ... + 10317718.

It is an arithmetic number, because the mean of its divisors is an integer number (106615262248).

Almost surely, 2^426440434261 is an apocalyptic number.

It is an amenable number.

426440434261 is a deficient number, since it is larger than the sum of its proper divisors (20614731).

426440434261 is a wasteful number, since it uses less digits than its factorization.

426440434261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20614730.

The product of its (nonzero) digits is 442368, while the sum is 40.

Adding to 426440434261 its reverse (162434044624), we get a palindrome (588874478885).

The spelling of 426440434261 in words is "four hundred twenty-six billion, four hundred forty million, four hundred thirty-four thousand, two hundred sixty-one".