39986481553 has 2 divisors, whose sum is σ = 39986481554. Its totient is φ = 39986481552.

The previous prime is 39986481523. The next prime is 39986481569. The reversal of 39986481553 is 35518468993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30245383744 + 9741097809 = 173912^2 + 98697^2 .

It is a cyclic number.

It is not a de Polignac number, because 39986481553 - 2²⁵ = 39952927121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39986481491 and 39986481500.

It is not a weakly prime, because it can be changed into another prime (39986481523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19993240776 + 19993240777.

It is an arithmetic number, because the mean of its divisors is an integer number (19993240777).

Almost surely, 2^39986481553 is an apocalyptic number.

It is an amenable number.

39986481553 is a deficient number, since it is larger than the sum of its proper divisors (1).

39986481553 is an equidigital number, since it uses as much as digits as its factorization.

39986481553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27993600, while the sum is 61.

The spelling of 39986481553 in words is "thirty-nine billion, nine hundred eighty-six million, four hundred eighty-one thousand, five hundred fifty-three".