1799981457 has 8 divisors (see below), whose sum is σ = 2415869760. Its totient is φ = 1192040400.

The previous prime is 1799981423. The next prime is 1799981501. The reversal of 1799981457 is 7541899971.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1799981457 - 2⁷ = 1799981329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1799981457.

It is not an unprimeable number, because it can be changed into a prime (1799981857) 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, 1986282 + ... + 1987187.

It is an arithmetic number, because the mean of its divisors is an integer number (301983720).

Almost surely, 2^1799981457 is an apocalyptic number.

It is an amenable number.

1799981457 is a deficient number, since it is larger than the sum of its proper divisors (615888303).

1799981457 is a wasteful number, since it uses less digits than its factorization.

1799981457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973623.

The product of its digits is 5715360, while the sum is 60.

The square root of 1799981457 is about 42426.1883392793. The cubic root of 1799981457 is about 1216.4362219792.

The spelling of 1799981457 in words is "one billion, seven hundred ninety-nine million, nine hundred eighty-one thousand, four hundred fifty-seven".