33642640520 has 16 divisors (see below), whose sum is σ = 75695941260. Its totient is φ = 13457056192.

The previous prime is 33642640519. The next prime is 33642640531. The reversal of 33642640520 is 2504624633.

It can be written as a sum of positive squares in 2 ways, for example, as 32686470436 + 956170084 = 180794^2 + 30922^2 .

It is a super-2 number, since 2×33642640520² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420532967 + ... + 420533046.

Almost surely, 2^33642640520 is an apocalyptic number.

It is an amenable number.

33642640520 is an abundant number, since it is smaller than the sum of its proper divisors (42053300740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33642640520 is a wasteful number, since it uses less digits than its factorization.

33642640520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841066024 (or 841066020 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 35.

The spelling of 33642640520 in words is "thirty-three billion, six hundred forty-two million, six hundred forty thousand, five hundred twenty".