486915623981 has 2 divisors, whose sum is σ = 486915623982. Its totient is φ = 486915623980.

The previous prime is 486915623951. The next prime is 486915624001. The reversal of 486915623981 is 189326519684.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319638713956 + 167276910025 = 565366^2 + 408995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-486915623981 is a prime.

It is a super-2 number, since 2×486915623981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (486915623951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243457811990 + 243457811991.

It is an arithmetic number, because the mean of its divisors is an integer number (243457811991).

Almost surely, 2^486915623981 is an apocalyptic number.

It is an amenable number.

486915623981 is a deficient number, since it is larger than the sum of its proper divisors (1).

486915623981 is an equidigital number, since it uses as much as digits as its factorization.

486915623981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22394880, while the sum is 62.

The spelling of 486915623981 in words is "four hundred eighty-six billion, nine hundred fifteen million, six hundred twenty-three thousand, nine hundred eighty-one".