2006401164821 has 8 divisors (see below), whose sum is σ = 2031828374400. Its totient is φ = 1980974698560.

The previous prime is 2006401164791. The next prime is 2006401164853. The reversal of 2006401164821 is 1284611046002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2006401164821 - 2¹⁸ = 2006400902677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006401167821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6992186 + ... + 7273476.

It is an arithmetic number, because the mean of its divisors is an integer number (253978546800).

Almost surely, 2^{2006401164821} is an apocalyptic number.

It is an amenable number.

2006401164821 is a deficient number, since it is larger than the sum of its proper divisors (25427209579).

2006401164821 is an equidigital number, since it uses as much as digits as its factorization.

2006401164821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371659.

The product of its (nonzero) digits is 18432, while the sum is 35.

The spelling of 2006401164821 in words is "two trillion, six billion, four hundred one million, one hundred sixty-four thousand, eight hundred twenty-one".