1791316540 has 24 divisors (see below), whose sum is σ = 4051131840. Its totient is φ = 661409088.

The previous prime is 1791316519. The next prime is 1791316543. The reversal of 1791316540 is 456131971.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1791316540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1791316543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3444580 + ... + 3445099.

It is an arithmetic number, because the mean of its divisors is an integer number (168797160).

Almost surely, 2^1791316540 is an apocalyptic number.

1791316540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1791316540 is an abundant number, since it is smaller than the sum of its proper divisors (2259815300).

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

1791316540 is a wasteful number, since it uses less digits than its factorization.

1791316540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6889701 (or 6889699 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 1791316540 is about 42323.9475947129. The cubic root of 1791316540 is about 1214.4811504317.

It can be divided in two parts, 17913 and 16540, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 1791316540 in words is "one billion, seven hundred ninety-one million, three hundred sixteen thousand, five hundred forty".