642729379283 has 16 divisors (see below), whose sum is σ = 677369372160. Its totient is φ = 608650568064.

The previous prime is 642729379241. The next prime is 642729379289. The reversal of 642729379283 is 382973927246.

It is a cyclic number.

It is not a de Polignac number, because 642729379283 - 2²⁰ = 642728330707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642729379289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9178160 + ... + 9247922.

It is an arithmetic number, because the mean of its divisors is an integer number (42335585760).

Almost surely, 2^642729379283 is an apocalyptic number.

642729379283 is a deficient number, since it is larger than the sum of its proper divisors (34639992877).

642729379283 is a wasteful number, since it uses less digits than its factorization.

642729379283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73778.

The product of its digits is 54867456, while the sum is 62.

The spelling of 642729379283 in words is "six hundred forty-two billion, seven hundred twenty-nine million, three hundred seventy-nine thousand, two hundred eighty-three".