33780497747945 has 16 divisors (see below), whose sum is σ = 43655182723152. Its totient is φ = 24945377975040.

The previous prime is 33780497747849. The next prime is 33780497747951. The reversal of 33780497747945 is 54974779408733.

It can be written as a sum of positive squares in 8 ways, for example, as 11547688479721 + 22232809268224 = 3398189^2 + 4715168^2 .

It is not a de Polignac number, because 33780497747945 - 2³⁶ = 33711778271209 is a prime.

It is a super-2 number, since 2×33780497747945² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5311799 + ... + 9786531.

It is an arithmetic number, because the mean of its divisors is an integer number (2728448920197).

Almost surely, 2^{33780497747945} is an apocalyptic number.

It is an amenable number.

33780497747945 is a deficient number, since it is larger than the sum of its proper divisors (9874684975207).

33780497747945 is a wasteful number, since it uses less digits than its factorization.

33780497747945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4590892.

The product of its (nonzero) digits is 4480842240, while the sum is 77.

The spelling of 33780497747945 in words is "thirty-three trillion, seven hundred eighty billion, four hundred ninety-seven million, seven hundred forty-seven thousand, nine hundred forty-five".