642804654 has 16 divisors (see below), whose sum is σ = 1327080960. Its totient is φ = 207356280.

The previous prime is 642804611. The next prime is 642804671. The reversal of 642804654 is 456408246.

642804654 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 1727784 + ... + 1728155.

It is an arithmetic number, because the mean of its divisors is an integer number (82942560).

Almost surely, 2^642804654 is an apocalyptic number.

642804654 is an abundant number, since it is smaller than the sum of its proper divisors (684276306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642804654 is a wasteful number, since it uses less digits than its factorization.

642804654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455975.

The product of its (nonzero) digits is 184320, while the sum is 39.

The square root of 642804654 is about 25353.5925265040. The cubic root of 642804654 is about 863.0308840864.

The spelling of 642804654 in words is "six hundred forty-two million, eight hundred four thousand, six hundred fifty-four".