264401103440431 has 4 divisors (see below), whose sum is σ = 267018936147864. Its totient is φ = 261783270733000.

The previous prime is 264401103440423. The next prime is 264401103440473. The reversal of 264401103440431 is 134044301104462.

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 264401103440431 - 2³ = 264401103440423 is a prime.

It is a super-2 number, since 2×264401103440431² (a number of 30 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 (264401103440491) 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, 1308916353565 + ... + 1308916353766.

It is an arithmetic number, because the mean of its divisors is an integer number (66754734036966).

Almost surely, 2^{264401103440431} is an apocalyptic number.

264401103440431 is a deficient number, since it is larger than the sum of its proper divisors (2617832707433).

264401103440431 is a wasteful number, since it uses less digits than its factorization.

264401103440431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617832707432.

The product of its (nonzero) digits is 110592, while the sum is 37.

Adding to 264401103440431 its reverse (134044301104462), we get a palindrome (398445404544893).

The spelling of 264401103440431 in words is "two hundred sixty-four trillion, four hundred one billion, one hundred three million, four hundred forty thousand, four hundred thirty-one".