642348995 has 8 divisors (see below), whose sum is σ = 816161184. Its totient is φ = 483650944.

The previous prime is 642348977. The next prime is 642348997. The reversal of 642348995 is 599843246.

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 642348995 - 2¹⁰ = 642347971 is a prime.

It is a super-2 number, since 2×642348995² = 825224462755020050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642348997) 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, 3778439 + ... + 3778608.

It is an arithmetic number, because the mean of its divisors is an integer number (102020148).

Almost surely, 2^642348995 is an apocalyptic number.

642348995 is a deficient number, since it is larger than the sum of its proper divisors (173812189).

642348995 is a wasteful number, since it uses less digits than its factorization.

642348995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7557069.

The product of its digits is 1866240, while the sum is 50.

The square root of 642348995 is about 25344.6048499478. The cubic root of 642348995 is about 862.8269129717.

The spelling of 642348995 in words is "six hundred forty-two million, three hundred forty-eight thousand, nine hundred ninety-five".