642674247419 has 4 divisors (see below), whose sum is σ = 645234702840. Its totient is φ = 640113792000.

The previous prime is 642674247407. The next prime is 642674247487. The reversal of 642674247419 is 914742476246.

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 642674247419 - 2⁴ = 642674247403 is a prime.

It is a super-2 number, since 2×642674247419² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642674247499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1280227334 + ... + 1280227835.

It is an arithmetic number, because the mean of its divisors is an integer number (161308675710).

Almost surely, 2^642674247419 is an apocalyptic number.

642674247419 is a deficient number, since it is larger than the sum of its proper divisors (2560455421).

642674247419 is a wasteful number, since it uses less digits than its factorization.

642674247419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560455420.

The product of its digits is 16257024, while the sum is 56.

The spelling of 642674247419 in words is "six hundred forty-two billion, six hundred seventy-four million, two hundred forty-seven thousand, four hundred nineteen".