642748085364 has 96 divisors (see below), whose sum is σ = 1887287786496. Its totient is φ = 165387271680.

The previous prime is 642748085323. The next prime is 642748085383. The reversal of 642748085364 is 463580847246.

642748085364 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3151669 + ... + 3349404.

It is an arithmetic number, because the mean of its divisors is an integer number (19659247776).

Almost surely, 2^642748085364 is an apocalyptic number.

It is an amenable number.

642748085364 is an abundant number, since it is smaller than the sum of its proper divisors (1244539701132).

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

642748085364 is a wasteful number, since it uses less digits than its factorization.

642748085364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6501205 (or 6501203 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 57.

The spelling of 642748085364 in words is "six hundred forty-two billion, seven hundred forty-eight million, eighty-five thousand, three hundred sixty-four".