642763186747 has 16 divisors (see below), whose sum is σ = 704346612480. Its totient is φ = 581705474400.

The previous prime is 642763186727. The next prime is 642763186763. The reversal of 642763186747 is 747681367246.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 642763186747 - 2¹¹ = 642763184699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642763186727) 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 15 ways as a sum of consecutive naturals, for example, 37380922 + ... + 37398112.

It is an arithmetic number, because the mean of its divisors is an integer number (44021663280).

Almost surely, 2^642763186747 is an apocalyptic number.

642763186747 is a deficient number, since it is larger than the sum of its proper divisors (61583425733).

642763186747 is a wasteful number, since it uses less digits than its factorization.

642763186747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32274.

The product of its digits is 56899584, while the sum is 61.

The spelling of 642763186747 in words is "six hundred forty-two billion, seven hundred sixty-three million, one hundred eighty-six thousand, seven hundred forty-seven".