642366351 has 24 divisors (see below), whose sum is σ = 1016018640. Its totient is φ = 387849600.

The previous prime is 642366349. The next prime is 642366353. The reversal of 642366351 is 153663246.

642366351 is a `hidden beast` number, since 642 + 3 + 6 + 6 + 3 + 5 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (642366349) and next prime (642366353).

It is not a de Polignac number, because 642366351 - 2¹ = 642366349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642366353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14571 + ... + 38691.

It is an arithmetic number, because the mean of its divisors is an integer number (42334110).

Almost surely, 2^642366351 is an apocalyptic number.

642366351 is a deficient number, since it is larger than the sum of its proper divisors (373652289).

642366351 is a wasteful number, since it uses less digits than its factorization.

642366351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24407 (or 24404 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 642366351 is about 25344.9472479230. The cubic root of 642366351 is about 862.8346839753.

The spelling of 642366351 in words is "six hundred forty-two million, three hundred sixty-six thousand, three hundred fifty-one".