10205781540 has 24 divisors (see below), whose sum is σ = 28576188480. Its totient is φ = 2721541728.

The previous prime is 10205781511. The next prime is 10205781557. The reversal of 10205781540 is 4518750201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85048120 + ... + 85048239.

It is an arithmetic number, because the mean of its divisors is an integer number (1190674520).

Almost surely, 2^10205781540 is an apocalyptic number.

10205781540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10205781540 is an abundant number, since it is smaller than the sum of its proper divisors (18370406940).

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

10205781540 is a wasteful number, since it uses less digits than its factorization.

10205781540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170096371 (or 170096369 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 33.

The spelling of 10205781540 in words is "ten billion, two hundred five million, seven hundred eighty-one thousand, five hundred forty".