1540940816 has 40 divisors (see below), whose sum is σ = 3028285344. Its totient is φ = 759490560.

The previous prime is 1540940803. The next prime is 1540940833. The reversal of 1540940816 is 6180490451.

It is a self number, because there is not a number n which added to its sum of digits gives 1540940816.

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, 765251 + ... + 767261.

Almost surely, 2^1540940816 is an apocalyptic number.

1540940816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1540940816 is a deficient number, since it is larger than the sum of its proper divisors (1487344528).

1540940816 is a wasteful number, since it uses less digits than its factorization.

1540940816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679 (or 2673 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 1540940816 is about 39254.8190162686. The cubic root of 1540940816 is about 1155.0354657625.

The spelling of 1540940816 in words is "one billion, five hundred forty million, nine hundred forty thousand, eight hundred sixteen".