642599072 has 12 divisors (see below), whose sum is σ = 1265116986. Its totient is φ = 321299520.

The previous prime is 642599053. The next prime is 642599107. The reversal of 642599072 is 270995246.

It can be written as a sum of positive squares in only one way, i.e., 566630416 + 75968656 = 23804^2 + 8716^2 .

It is a super-2 number, since 2×642599072² = 825867134670522368, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10040579 + ... + 10040642.

Almost surely, 2^642599072 is an apocalyptic number.

It is an amenable number.

642599072 is a deficient number, since it is larger than the sum of its proper divisors (622517914).

642599072 is a wasteful number, since it uses less digits than its factorization.

642599072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20081231 (or 20081223 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 642599072 is about 25349.5379050585. The cubic root of 642599072 is about 862.9388693341.

The spelling of 642599072 in words is "six hundred forty-two million, five hundred ninety-nine thousand, seventy-two".