642527068 has 6 divisors (see below), whose sum is σ = 1124422376. Its totient is φ = 321263532.

The previous prime is 642527059. The next prime is 642527069. The reversal of 642527068 is 860725246.

642527068 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×642527068² = 825682066225353248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 642527068.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642527069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80315880 + ... + 80315887.

Almost surely, 2^642527068 is an apocalyptic number.

It is an amenable number.

642527068 is a deficient number, since it is larger than the sum of its proper divisors (481895308).

642527068 is a wasteful number, since it uses less digits than its factorization.

642527068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160631771 (or 160631769 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 642527068 is about 25348.1176421446. The cubic root of 642527068 is about 862.9066370169.

The spelling of 642527068 in words is "six hundred forty-two million, five hundred twenty-seven thousand, sixty-eight".