39746671457 has 2 divisors, whose sum is σ = 39746671458. Its totient is φ = 39746671456.

The previous prime is 39746671409. The next prime is 39746671469. The reversal of 39746671457 is 75417664793.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29324507536 + 10422163921 = 171244^2 + 102089^2 .

It is an emirp because it is prime and its reverse (75417664793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39746671457 - 2²⁰ = 39745622881 is a prime.

It is a super-3 number, since 3×39746671457³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39746671396 and 39746671405.

It is not a weakly prime, because it can be changed into another prime (39746601457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19873335728 + 19873335729.

It is an arithmetic number, because the mean of its divisors is an integer number (19873335729).

Almost surely, 2^39746671457 is an apocalyptic number.

It is an amenable number.

39746671457 is a deficient number, since it is larger than the sum of its proper divisors (1).

39746671457 is an equidigital number, since it uses as much as digits as its factorization.

39746671457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26671680, while the sum is 59.

The spelling of 39746671457 in words is "thirty-nine billion, seven hundred forty-six million, six hundred seventy-one thousand, four hundred fifty-seven".