33891321644 has 6 divisors (see below), whose sum is σ = 59309812884. Its totient is φ = 16945660820.

The previous prime is 33891321643. The next prime is 33891321677. The reversal of 33891321644 is 44612319833.

It is a super-2 number, since 2×33891321644² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33891321595 and 33891321604.

It is not an unprimeable number, because it can be changed into a prime (33891321643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4236415202 + ... + 4236415209.

It is an arithmetic number, because the mean of its divisors is an integer number (9884968814).

Almost surely, 2^33891321644 is an apocalyptic number.

It is an amenable number.

33891321644 is a deficient number, since it is larger than the sum of its proper divisors (25418491240).

33891321644 is a wasteful number, since it uses less digits than its factorization.

33891321644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8472830415 (or 8472830413 counting only the distinct ones).

The product of its digits is 373248, while the sum is 44.

The spelling of 33891321644 in words is "thirty-three billion, eight hundred ninety-one million, three hundred twenty-one thousand, six hundred forty-four".