39466779481 has 2 divisors, whose sum is σ = 39466779482. Its totient is φ = 39466779480.

The previous prime is 39466779479. The next prime is 39466779509. The reversal of 39466779481 is 18497766493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37642208256 + 1824571225 = 194016^2 + 42715^2 .

It is a cyclic number.

It is not a de Polignac number, because 39466779481 - 2¹ = 39466779479 is a prime.

It is a super-2 number, since 2×39466779481² (a number of 22 digits) contains 22 as substring.

Together with 39466779479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (39466779181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19733389740 + 19733389741.

It is an arithmetic number, because the mean of its divisors is an integer number (19733389741).

Almost surely, 2^39466779481 is an apocalyptic number.

It is an amenable number.

39466779481 is a deficient number, since it is larger than the sum of its proper divisors (1).

39466779481 is an equidigital number, since it uses as much as digits as its factorization.

39466779481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54867456, while the sum is 64.

The spelling of 39466779481 in words is "thirty-nine billion, four hundred sixty-six million, seven hundred seventy-nine thousand, four hundred eighty-one".