33640463646021 has 32 divisors (see below), whose sum is σ = 45307607240448. Its totient is φ = 22201149140480.

The previous prime is 33640463645993. The next prime is 33640463646107. The reversal of 33640463646021 is 12064636404633.

It is a cyclic number.

It is not a de Polignac number, because 33640463646021 - 2¹⁴ = 33640463629637 is a prime.

It is a super-2 number, since 2×33640463646021² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33640463686021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213822616 + ... + 213979886.

It is an arithmetic number, because the mean of its divisors is an integer number (1415862726264).

Almost surely, 2^{33640463646021} is an apocalyptic number.

It is an amenable number.

33640463646021 is a deficient number, since it is larger than the sum of its proper divisors (11667143594427).

33640463646021 is a wasteful number, since it uses less digits than its factorization.

33640463646021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158861.

The product of its (nonzero) digits is 4478976, while the sum is 48.

The spelling of 33640463646021 in words is "thirty-three trillion, six hundred forty billion, four hundred sixty-three million, six hundred forty-six thousand, twenty-one".