306216434145661 has 32 divisors (see below), whose sum is σ = 367809960672000. Its totient is φ = 251852231162880.

The previous prime is 306216434145653. The next prime is 306216434145691. The reversal of 306216434145661 is 166541434612603.

It is not a de Polignac number, because 306216434145661 - 2³ = 306216434145653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 306216434145599 and 306216434145608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306216434145691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20189230 + ... + 31938031.

It is an arithmetic number, because the mean of its divisors is an integer number (11494061271000).

Almost surely, 2^{306216434145661} is an apocalyptic number.

It is an amenable number.

306216434145661 is a deficient number, since it is larger than the sum of its proper divisors (61593526526339).

306216434145661 is a wasteful number, since it uses less digits than its factorization.

306216434145661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52128709.

The product of its (nonzero) digits is 7464960, while the sum is 52.

The spelling of 306216434145661 in words is "three hundred six trillion, two hundred sixteen billion, four hundred thirty-four million, one hundred forty-five thousand, six hundred sixty-one".