33505412491 has 2 divisors, whose sum is σ = 33505412492. Its totient is φ = 33505412490.

The previous prime is 33505412483. The next prime is 33505412509. The reversal of 33505412491 is 19421450533.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 33505412491 - 2³ = 33505412483 is a prime.

It is a super-2 number, since 2×33505412491² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33505412491.

It is not a weakly prime, because it can be changed into another prime (33505412791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16752706245 + 16752706246.

It is an arithmetic number, because the mean of its divisors is an integer number (16752706246).

Almost surely, 2^33505412491 is an apocalyptic number.

33505412491 is a deficient number, since it is larger than the sum of its proper divisors (1).

33505412491 is an equidigital number, since it uses as much as digits as its factorization.

33505412491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 33505412491 in words is "thirty-three billion, five hundred five million, four hundred twelve thousand, four hundred ninety-one".