33938557957 has 2 divisors, whose sum is σ = 33938557958. Its totient is φ = 33938557956.

The previous prime is 33938557819. The next prime is 33938557981. The reversal of 33938557957 is 75975583933.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27953833636 + 5984724321 = 167194^2 + 77361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33938557957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33938057957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16969278978 + 16969278979.

It is an arithmetic number, because the mean of its divisors is an integer number (16969278979).

Almost surely, 2^33938557957 is an apocalyptic number.

It is an amenable number.

33938557957 is a deficient number, since it is larger than the sum of its proper divisors (1).

33938557957 is an equidigital number, since it uses as much as digits as its factorization.

33938557957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107163000, while the sum is 64.

The spelling of 33938557957 in words is "thirty-three billion, nine hundred thirty-eight million, five hundred fifty-seven thousand, nine hundred fifty-seven".