1806901806528 has 672 divisors, whose sum is σ = 6547327113600. Its totient is φ = 473404538880.

The previous prime is 1806901806527. The next prime is 1806901806587. The reversal of 1806901806528 is 8256081096081.

It is a happy number.

1806901806528 is a `hidden beast` number, since 18 + 0 + 6 + 90 + 18 + 0 + 6 + 528 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806901806527) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 403234048 + ... + 403238528.

It is an arithmetic number, because the mean of its divisors is an integer number (9743046300).

Almost surely, 2^{1806901806528} is an apocalyptic number.

1806901806528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1806901806528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3273663556800).

1806901806528 is an abundant number, since it is smaller than the sum of its proper divisors (4740425307072).

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

1806901806528 is a wasteful number, since it uses less digits than its factorization.

1806901806528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4690 (or 4663 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 54.

The spelling of 1806901806528 in words is "one trillion, eight hundred six billion, nine hundred one million, eight hundred six thousand, five hundred twenty-eight".