642051582722 has 16 divisors (see below), whose sum is σ = 1050952555872. Its totient is φ = 291751991520.

The previous prime is 642051582719. The next prime is 642051582743. The reversal of 642051582722 is 227285150246.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4408568 + ... + 4551875.

It is an arithmetic number, because the mean of its divisors is an integer number (65684534742).

Almost surely, 2^642051582722 is an apocalyptic number.

642051582722 is a deficient number, since it is larger than the sum of its proper divisors (408900973150).

642051582722 is a wasteful number, since it uses less digits than its factorization.

642051582722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8963713.

The product of its (nonzero) digits is 537600, while the sum is 44.

The spelling of 642051582722 in words is "six hundred forty-two billion, fifty-one million, five hundred eighty-two thousand, seven hundred twenty-two".