642215741072 has 20 divisors (see below), whose sum is σ = 1245457009980. Its totient is φ = 320807480448.

The previous prime is 642215741059. The next prime is 642215741081. The reversal of 642215741072 is 270147512246.

It can be written as a sum of positive squares in 2 ways, for example, as 294983679376 + 347232061696 = 543124^2 + 589264^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18756743 + ... + 18790950.

It is an arithmetic number, because the mean of its divisors is an integer number (62272850499).

Almost surely, 2^642215741072 is an apocalyptic number.

It is an amenable number.

642215741072 is a deficient number, since it is larger than the sum of its proper divisors (603241268908).

642215741072 is a wasteful number, since it uses less digits than its factorization.

642215741072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37548770 (or 37548764 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 41.

The spelling of 642215741072 in words is "six hundred forty-two billion, two hundred fifteen million, seven hundred forty-one thousand, seventy-two".