642616226 has 16 divisors (see below), whose sum is σ = 1116720384. Its totient is φ = 271633824.

The previous prime is 642616217. The next prime is 642616283. The reversal of 642616226 is 622616246.

It is a super-2 number, since 2×642616226² = 825911227836966152, which contains 22 as substring.

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, 313370 + ... + 315413.

It is an arithmetic number, because the mean of its divisors is an integer number (69795024).

Almost surely, 2^642616226 is an apocalyptic number.

642616226 is a deficient number, since it is larger than the sum of its proper divisors (474104158).

642616226 is a wasteful number, since it uses less digits than its factorization.

642616226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628865.

The product of its digits is 41472, while the sum is 35.

The square root of 642616226 is about 25349.8762521634. The cubic root of 642616226 is about 862.9465479019.

The spelling of 642616226 in words is "six hundred forty-two million, six hundred sixteen thousand, two hundred twenty-six".