140805811920 has 80 divisors (see below), whose sum is σ = 438120887040. Its totient is φ = 37408614912.

The previous prime is 140805811891. The next prime is 140805812011. The reversal of 140805811920 is 29118508041.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1025944 + ... + 1155063.

It is an arithmetic number, because the mean of its divisors is an integer number (5476511088).

Almost surely, 2^140805811920 is an apocalyptic number.

140805811920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140805811920 is an abundant number, since it is smaller than the sum of its proper divisors (297315075120).

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

140805811920 is a wasteful number, since it uses less digits than its factorization.

140805811920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181292 (or 2181286 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 39.

The spelling of 140805811920 in words is "one hundred forty billion, eight hundred five million, eight hundred eleven thousand, nine hundred twenty".