642419716 has 81 divisors (see below), whose sum is σ = 1284595221. Its totient is φ = 281036448.

The previous prime is 642419689. The next prime is 642419717. The reversal of 642419716 is 617914246.

The square root of 642419716 is 25346.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 336869316 + 305550400 = 18354^2 + 17480^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642419717) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 22152390 + ... + 22152418.

Almost surely, 2^642419716 is an apocalyptic number.

642419716 is the 25346-th square number.

It is an amenable number.

642419716 is a deficient number, since it is larger than the sum of its proper divisors (642175505).

642419716 is a wasteful number, since it uses less digits than its factorization.

642419716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 73 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The cubic root of 642419716 is about 862.8585768301.

The spelling of 642419716 in words is "six hundred forty-two million, four hundred nineteen thousand, seven hundred sixteen".