642401468 has 48 divisors (see below), whose sum is σ = 1187923968. Its totient is φ = 303576000.

The previous prime is 642401449. The next prime is 642401471. The reversal of 642401468 is 864104246.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1153046 + ... + 1153602.

It is an arithmetic number, because the mean of its divisors is an integer number (24748416).

Almost surely, 2^642401468 is an apocalyptic number.

It is an amenable number.

642401468 is a deficient number, since it is larger than the sum of its proper divisors (545522500).

642401468 is a wasteful number, since it uses less digits than its factorization.

642401468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794 (or 792 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 642401468 is about 25345.6400195379. The cubic root of 642401468 is about 862.8504068897.

The spelling of 642401468 in words is "six hundred forty-two million, four hundred one thousand, four hundred sixty-eight".