642220560476 has 48 divisors (see below), whose sum is σ = 1301070405600. Its totient is φ = 274134712320.

The previous prime is 642220560473. The next prime is 642220560481. The reversal of 642220560476 is 674065022246.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642220560473) 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, 620255 + ... + 1291958.

It is an arithmetic number, because the mean of its divisors is an integer number (27105633450).

Almost surely, 2^642220560476 is an apocalyptic number.

It is an amenable number.

642220560476 is an abundant number, since it is smaller than the sum of its proper divisors (658849845124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642220560476 is a wasteful number, since it uses less digits than its factorization.

642220560476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912694 (or 1912692 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 44.

The spelling of 642220560476 in words is "six hundred forty-two billion, two hundred twenty million, five hundred sixty thousand, four hundred seventy-six".