648636042 has 8 divisors (see below), whose sum is σ = 1297272096. Its totient is φ = 216212012.

The previous prime is 648636019. The next prime is 648636073. The reversal of 648636042 is 240636846.

It is a sphenic number, since it is the product of 3 distinct primes.

648636042 is an admirable number.

It is a super-3 number, since 3×648636042³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54052998 + ... + 54053009.

It is an arithmetic number, because the mean of its divisors is an integer number (162159012).

Almost surely, 2^648636042 is an apocalyptic number.

648636042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

648636042 is a wasteful number, since it uses less digits than its factorization.

648636042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108106012.

The product of its (nonzero) digits is 165888, while the sum is 39.

The square root of 648636042 is about 25468.3341033527. The cubic root of 648636042 is about 865.6327765457.

The spelling of 648636042 in words is "six hundred forty-eight million, six hundred thirty-six thousand, forty-two".