64016401601021 has 4 divisors (see below), whose sum is σ = 67782072283452. Its totient is φ = 60250730918592.

The previous prime is 64016401600967. The next prime is 64016401601077. The reversal of 64016401601021 is 12010610461046.

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 32386058265625 + 31630343335396 = 5690875^2 + 5624086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64016401601021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64016401601821) 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, 1882835341190 + ... + 1882835341223.

It is an arithmetic number, because the mean of its divisors is an integer number (16945518070863).

Almost surely, 2^{64016401601021} is an apocalyptic number.

It is an amenable number.

64016401601021 is a deficient number, since it is larger than the sum of its proper divisors (3765670682431).

64016401601021 is a wasteful number, since it uses less digits than its factorization.

64016401601021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3765670682430.

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 64016401601021 in words is "sixty-four trillion, sixteen billion, four hundred one million, six hundred one thousand, twenty-one".