642257228462 has 4 divisors (see below), whose sum is σ = 963385842696. Its totient is φ = 321128614230.

The previous prime is 642257228453. The next prime is 642257228467. The reversal of 642257228462 is 264822752246.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 642257228462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642257228467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160564307114 + ... + 160564307117.

It is an arithmetic number, because the mean of its divisors is an integer number (240846460674).

Almost surely, 2^642257228462 is an apocalyptic number.

642257228462 is a deficient number, since it is larger than the sum of its proper divisors (321128614234).

642257228462 is a wasteful number, since it uses less digits than its factorization.

642257228462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321128614233.

The product of its digits is 5160960, while the sum is 50.

The spelling of 642257228462 in words is "six hundred forty-two billion, two hundred fifty-seven million, two hundred twenty-eight thousand, four hundred sixty-two".