1999724590365 has 32 divisors (see below), whose sum is σ = 3208008240000. Its totient is φ = 1063704268800.

The previous prime is 1999724590337. The next prime is 1999724590399. The reversal of 1999724590365 is 5630954279991.

It is not a de Polignac number, because 1999724590365 - 2¹⁶ = 1999724524829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1999724590365.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49356886 + ... + 49397384.

It is an arithmetic number, because the mean of its divisors is an integer number (100250257500).

Almost surely, 2^{1999724590365} is an apocalyptic number.

1999724590365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1999724590365 is a deficient number, since it is larger than the sum of its proper divisors (1208283649635).

1999724590365 is a wasteful number, since it uses less digits than its factorization.

1999724590365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49117.

The product of its (nonzero) digits is 165337200, while the sum is 69.

The spelling of 1999724590365 in words is "one trillion, nine hundred ninety-nine billion, seven hundred twenty-four million, five hundred ninety thousand, three hundred sixty-five".