642431662265 has 8 divisors (see below), whose sum is σ = 770956221888. Its totient is φ = 513919845040.

The previous prime is 642431662261. The next prime is 642431662303. The reversal of 642431662265 is 562266134246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642431662265 - 2² = 642431662261 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642431662261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3074327 + ... + 3276636.

It is an arithmetic number, because the mean of its divisors is an integer number (96369527736).

Almost surely, 2^642431662265 is an apocalyptic number.

It is an amenable number.

642431662265 is a deficient number, since it is larger than the sum of its proper divisors (128524559623).

642431662265 is a wasteful number, since it uses less digits than its factorization.

642431662265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6371199.

The product of its digits is 2488320, while the sum is 47.

The spelling of 642431662265 in words is "six hundred forty-two billion, four hundred thirty-one million, six hundred sixty-two thousand, two hundred sixty-five".