39433621457 has 2 divisors, whose sum is σ = 39433621458. Its totient is φ = 39433621456.

The previous prime is 39433621453. The next prime is 39433621499. The reversal of 39433621457 is 75412633493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36541763281 + 2891858176 = 191159^2 + 53776^2 .

It is a cyclic number.

It is not a de Polignac number, because 39433621457 - 2² = 39433621453 is a prime.

It is not a weakly prime, because it can be changed into another prime (39433621453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19716810728 + 19716810729.

It is an arithmetic number, because the mean of its divisors is an integer number (19716810729).

Almost surely, 2^39433621457 is an apocalyptic number.

It is an amenable number.

39433621457 is a deficient number, since it is larger than the sum of its proper divisors (1).

39433621457 is an equidigital number, since it uses as much as digits as its factorization.

39433621457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 47.

The spelling of 39433621457 in words is "thirty-nine billion, four hundred thirty-three million, six hundred twenty-one thousand, four hundred fifty-seven".