642047207880 has 128 divisors (see below), whose sum is σ = 2130368889600. Its totient is φ = 153770959872.

The previous prime is 642047207773. The next prime is 642047207881. The reversal of 642047207880 is 88702740246.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (642047207881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5504020 + ... + 5619459.

It is an arithmetic number, because the mean of its divisors is an integer number (16643506950).

Almost surely, 2^642047207880 is an apocalyptic number.

642047207880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

642047207880 is an abundant number, since it is smaller than the sum of its proper divisors (1488321681720).

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

642047207880 is a wasteful number, since it uses less digits than its factorization.

642047207880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11123543 (or 11123539 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 48.

The spelling of 642047207880 in words is "six hundred forty-two billion, forty-seven million, two hundred seven thousand, eight hundred eighty".