642362776625 has 64 divisors (see below), whose sum is σ = 860621538816. Its totient is φ = 477433440000.

The previous prime is 642362776469. The next prime is 642362776661. The reversal of 642362776625 is 526677263246.

642362776625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642362776625 - 2¹⁴ = 642362760241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 65202950 + ... + 65212800.

It is an arithmetic number, because the mean of its divisors is an integer number (13447211544).

Almost surely, 2^642362776625 is an apocalyptic number.

It is an amenable number.

642362776625 is a deficient number, since it is larger than the sum of its proper divisors (218258762191).

642362776625 is a wasteful number, since it uses less digits than its factorization.

642362776625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10539 (or 10529 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 56.

The spelling of 642362776625 in words is "six hundred forty-two billion, three hundred sixty-two million, seven hundred seventy-six thousand, six hundred twenty-five".