642676342405 has 8 divisors (see below), whose sum is σ = 782722232352. Its totient is φ = 506467326288.

The previous prime is 642676342339. The next prime is 642676342421. The reversal of 642676342405 is 504243676246.

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

It is a cyclic number.

It is not a de Polignac number, because 642676342405 - 2¹⁵ = 642676309637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 959218087 + ... + 959218756.

It is an arithmetic number, because the mean of its divisors is an integer number (97840279044).

Almost surely, 2^642676342405 is an apocalyptic number.

It is an amenable number.

642676342405 is a deficient number, since it is larger than the sum of its proper divisors (140045889947).

642676342405 is a wasteful number, since it uses less digits than its factorization.

642676342405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918436915.

The product of its (nonzero) digits is 5806080, while the sum is 49.

The spelling of 642676342405 in words is "six hundred forty-two billion, six hundred seventy-six million, three hundred forty-two thousand, four hundred five".