30721433412705 has 64 divisors (see below), whose sum is σ = 57995095965696. Its totient is φ = 13589497152000.

The previous prime is 30721433412689. The next prime is 30721433412707. The reversal of 30721433412705 is 50721433412703.

It is a happy number.

It is not a de Polignac number, because 30721433412705 - 2⁴ = 30721433412689 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30721433412707) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28210525 + ... + 29279285.

It is an arithmetic number, because the mean of its divisors is an integer number (906173374464).

Almost surely, 2^{30721433412705} is an apocalyptic number.

30721433412705 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30721433412705 is a deficient number, since it is larger than the sum of its proper divisors (27273662552991).

30721433412705 is a wasteful number, since it uses less digits than its factorization.

30721433412705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077638.

The product of its (nonzero) digits is 423360, while the sum is 42.

The spelling of 30721433412705 in words is "thirty trillion, seven hundred twenty-one billion, four hundred thirty-three million, four hundred twelve thousand, seven hundred five".