642763416562 has 4 divisors (see below), whose sum is σ = 964145124846. Its totient is φ = 321381708280.

The previous prime is 642763416551. The next prime is 642763416571. The reversal of 642763416562 is 265614367246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 642673185561 + 90231001 = 801669^2 + 9499^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160690854139 + ... + 160690854142.

Almost surely, 2^642763416562 is an apocalyptic number.

642763416562 is a deficient number, since it is larger than the sum of its proper divisors (321381708284).

642763416562 is a wasteful number, since it uses less digits than its factorization.

642763416562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321381708283.

The product of its digits is 8709120, while the sum is 52.

The spelling of 642763416562 in words is "six hundred forty-two billion, seven hundred sixty-three million, four hundred sixteen thousand, five hundred sixty-two".