33940645357 has 2 divisors, whose sum is σ = 33940645358. Its totient is φ = 33940645356.

The previous prime is 33940645327. The next prime is 33940645363. The reversal of 33940645357 is 75354604933.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21591657481 + 12348987876 = 146941^2 + 111126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33940645357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33940645357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33940645327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16970322678 + 16970322679.

It is an arithmetic number, because the mean of its divisors is an integer number (16970322679).

Almost surely, 2^33940645357 is an apocalyptic number.

It is an amenable number.

33940645357 is a deficient number, since it is larger than the sum of its proper divisors (1).

33940645357 is an equidigital number, since it uses as much as digits as its factorization.

33940645357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4082400, while the sum is 49.

The spelling of 33940645357 in words is "thirty-three billion, nine hundred forty million, six hundred forty-five thousand, three hundred fifty-seven".