1801638594690 has 32 divisors (see below), whose sum is σ = 4717017412416. Its totient is φ = 436760871360.

The previous prime is 1801638594641. The next prime is 1801638594697. The reversal of 1801638594690 is 964958361081.

It is a super-2 number, since 2×1801638594690² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1801638594697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2729755117 + ... + 2729755776.

It is an arithmetic number, because the mean of its divisors is an integer number (147406794138).

Almost surely, 2^{1801638594690} is an apocalyptic number.

1801638594690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1801638594690 is an abundant number, since it is smaller than the sum of its proper divisors (2915378817726).

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

1801638594690 is a wasteful number, since it uses less digits than its factorization.

1801638594690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5459510914.

The product of its (nonzero) digits is 11197440, while the sum is 60.

The spelling of 1801638594690 in words is "one trillion, eight hundred one billion, six hundred thirty-eight million, five hundred ninety-four thousand, six hundred ninety".