642463561262 has 4 divisors (see below), whose sum is σ = 963695341896. Its totient is φ = 321231780630.

The previous prime is 642463561261. The next prime is 642463561301. The reversal of 642463561262 is 262165364246.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642463561261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160615890314 + ... + 160615890317.

It is an arithmetic number, because the mean of its divisors is an integer number (240923835474).

Almost surely, 2^642463561262 is an apocalyptic number.

642463561262 is a deficient number, since it is larger than the sum of its proper divisors (321231780634).

642463561262 is a wasteful number, since it uses less digits than its factorization.

642463561262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321231780633.

The product of its digits is 2488320, while the sum is 47.

The spelling of 642463561262 in words is "six hundred forty-two billion, four hundred sixty-three million, five hundred sixty-one thousand, two hundred sixty-two".