642763315547 has 8 divisors (see below), whose sum is σ = 643269654000. Its totient is φ = 642257144704.

The previous prime is 642763315427. The next prime is 642763315561. The reversal of 642763315547 is 745513367246.

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 642763315547 - 2²² = 642759121243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642763315577) 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, 8269079 + ... + 8346447.

It is an arithmetic number, because the mean of its divisors is an integer number (80408706750).

Almost surely, 2^642763315547 is an apocalyptic number.

642763315547 is a deficient number, since it is larger than the sum of its proper divisors (506338453).

642763315547 is a wasteful number, since it uses less digits than its factorization.

642763315547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83805.

The product of its digits is 12700800, while the sum is 53.

The spelling of 642763315547 in words is "six hundred forty-two billion, seven hundred sixty-three million, three hundred fifteen thousand, five hundred forty-seven".