16723387131890 has 8 divisors (see below), whose sum is σ = 30102096837420. Its totient is φ = 6689354852752.

The previous prime is 16723387131817. The next prime is 16723387131901. The reversal of 16723387131890 is 9813178332761.

It can be written as a sum of positive squares in 2 ways, for example, as 16111048016449 + 612339115441 = 4013857^2 + 782521^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836169356585 + ... + 836169356604.

Almost surely, 2^{16723387131890} is an apocalyptic number.

16723387131890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16723387131890 is a deficient number, since it is larger than the sum of its proper divisors (13378709705530).

16723387131890 is a wasteful number, since it uses less digits than its factorization.

16723387131890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672338713196.

The product of its (nonzero) digits is 9144576, while the sum is 59.

The spelling of 16723387131890 in words is "sixteen trillion, seven hundred twenty-three billion, three hundred eighty-seven million, one hundred thirty-one thousand, eight hundred ninety".