642412441649 has 8 divisors (see below), whose sum is σ = 700820178240. Its totient is φ = 584005806000.

The previous prime is 642412441637. The next prime is 642412441667. The reversal of 642412441649 is 946144214246.

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 642412441649 - 2⁴ = 642412441633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (642412441249) 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, 1375124 + ... + 1782074.

It is an arithmetic number, because the mean of its divisors is an integer number (87602522280).

Almost surely, 2^642412441649 is an apocalyptic number.

It is an amenable number.

642412441649 is a deficient number, since it is larger than the sum of its proper divisors (58407736591).

642412441649 is a wasteful number, since it uses less digits than its factorization.

642412441649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550471.

The product of its digits is 1327104, while the sum is 47.

The spelling of 642412441649 in words is "six hundred forty-two billion, four hundred twelve million, four hundred forty-one thousand, six hundred forty-nine".