642466136012 has 12 divisors (see below), whose sum is σ = 1128495352320. Its totient is φ = 320038892496.

The previous prime is 642466135991. The next prime is 642466136017. The reversal of 642466136012 is 210631664246.

It is not an unprimeable number, because it can be changed into a prime (642466136017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298542668 + ... + 298544819.

It is an arithmetic number, because the mean of its divisors is an integer number (94041279360).

Almost surely, 2^642466136012 is an apocalyptic number.

It is an amenable number.

642466136012 is a deficient number, since it is larger than the sum of its proper divisors (486029216308).

642466136012 is a wasteful number, since it uses less digits than its factorization.

642466136012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597087760 (or 597087758 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 642466136012 in words is "six hundred forty-two billion, four hundred sixty-six million, one hundred thirty-six thousand, twelve".