308705216485 has 16 divisors (see below), whose sum is σ = 387171010800. Its totient is φ = 235989927936.

The previous prime is 308705216461. The next prime is 308705216489. The reversal of 308705216485 is 584612507803.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 40192631361 + 268512585124 = 200481^2 + 518182^2 .

It is a cyclic number.

It is not a de Polignac number, because 308705216485 - 2⁵ = 308705216453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308705216489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10960170 + ... + 10988299.

It is an arithmetic number, because the mean of its divisors is an integer number (24198188175).

Almost surely, 2^308705216485 is an apocalyptic number.

It is an amenable number.

308705216485 is a deficient number, since it is larger than the sum of its proper divisors (78465794315).

308705216485 is a wasteful number, since it uses less digits than its factorization.

308705216485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21948600.

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 308705216485 in words is "three hundred eight billion, seven hundred five million, two hundred sixteen thousand, four hundred eighty-five".