33771630640 has 80 divisors (see below), whose sum is σ = 88420340736. Its totient is φ = 11884435200.

The previous prime is 33771630589. The next prime is 33771630647. The reversal of 33771630640 is 4603617733.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×33771630640² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 33771630593 and 33771630602.

It is not an unprimeable number, because it can be changed into a prime (33771630647) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 591702 + ... + 646261.

Almost surely, 2^33771630640 is an apocalyptic number.

It is an amenable number.

33771630640 is an abundant number, since it is smaller than the sum of its proper divisors (54648710096).

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

33771630640 is a wasteful number, since it uses less digits than its factorization.

33771630640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238018 (or 1238012 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 40.

The spelling of 33771630640 in words is "thirty-three billion, seven hundred seventy-one million, six hundred thirty thousand, six hundred forty".