900991803540 has 24 divisors (see below), whose sum is σ = 2522777050080. Its totient is φ = 240264480928.

The previous prime is 900991803463. The next prime is 900991803557. The reversal of 900991803540 is 45308199009.

It is a self number, because there is not a number n which added to its sum of digits gives 900991803540.

It is a congruent number.

It is an unprimeable number.

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, 7508264970 + ... + 7508265089.

It is an arithmetic number, because the mean of its divisors is an integer number (105115710420).

Almost surely, 2^900991803540 is an apocalyptic number.

It is an amenable number.

900991803540 is an abundant number, since it is smaller than the sum of its proper divisors (1621785246540).

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

900991803540 is a wasteful number, since it uses less digits than its factorization.

900991803540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15016530071 (or 15016530069 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The spelling of 900991803540 in words is "nine hundred billion, nine hundred ninety-one million, eight hundred three thousand, five hundred forty".