642361675451 has 4 divisors (see below), whose sum is σ = 642388907400. Its totient is φ = 642334443504.

The previous prime is 642361675433. The next prime is 642361675493. The reversal of 642361675451 is 154576163246.

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 642361675451 - 2¹⁴ = 642361659067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 642361675451.

It is not an unprimeable number, because it can be changed into a prime (642361671451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13580561 + ... + 13627778.

It is an arithmetic number, because the mean of its divisors is an integer number (160597226850).

Almost surely, 2^642361675451 is an apocalyptic number.

642361675451 is a deficient number, since it is larger than the sum of its proper divisors (27231949).

642361675451 is a wasteful number, since it uses less digits than its factorization.

642361675451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27231948.

The product of its digits is 3628800, while the sum is 50.

The spelling of 642361675451 in words is "six hundred forty-two billion, three hundred sixty-one million, six hundred seventy-five thousand, four hundred fifty-one".