33687441409 has 4 divisors (see below), whose sum is σ = 33688985860. Its totient is φ = 33685896960.

The previous prime is 33687441401. The next prime is 33687441413. The reversal of 33687441409 is 90414478633.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23247710784 + 10439730625 = 152472^2 + 102175^2 .

It is a cyclic number.

It is not a de Polignac number, because 33687441409 - 2³ = 33687441401 is a prime.

It is a super-2 number, since 2×33687441409² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33687441401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739032 + ... + 783289.

It is an arithmetic number, because the mean of its divisors is an integer number (8422246465).

Almost surely, 2^33687441409 is an apocalyptic number.

It is an amenable number.

33687441409 is a deficient number, since it is larger than the sum of its proper divisors (1544451).

33687441409 is a wasteful number, since it uses less digits than its factorization.

33687441409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544450.

The product of its (nonzero) digits is 1741824, while the sum is 49.

The spelling of 33687441409 in words is "thirty-three billion, six hundred eighty-seven million, four hundred forty-one thousand, four hundred nine".