721244670460042 has 16 divisors (see below), whose sum is σ = 1081913354051040. Its totient is φ = 360606886211088.

The previous prime is 721244670460037. The next prime is 721244670460049. The reversal of 721244670460042 is 240064076442127.

It is not an unprimeable number, because it can be changed into a prime (721244670460049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7804027309 + ... + 7804119727.

It is an arithmetic number, because the mean of its divisors is an integer number (67619584628190).

Almost surely, 2^{721244670460042} is an apocalyptic number.

721244670460042 is a deficient number, since it is larger than the sum of its proper divisors (360668683590998).

721244670460042 is a wasteful number, since it uses less digits than its factorization.

721244670460042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217365.

The product of its (nonzero) digits is 3612672, while the sum is 49.

The spelling of 721244670460042 in words is "seven hundred twenty-one trillion, two hundred forty-four billion, six hundred seventy million, four hundred sixty thousand, forty-two".