1540987168673 has 4 divisors (see below), whose sum is σ = 1545186044160. Its totient is φ = 1536788293188.

The previous prime is 1540987168667. The next prime is 1540987168681. The reversal of 1540987168673 is 3768617890451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1540987168673 - 2⁸ = 1540987168417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1540987168073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2099437193 + ... + 2099437926.

It is an arithmetic number, because the mean of its divisors is an integer number (386296511040).

Almost surely, 2^{1540987168673} is an apocalyptic number.

It is an amenable number.

1540987168673 is a deficient number, since it is larger than the sum of its proper divisors (4198875487).

1540987168673 is an equidigital number, since it uses as much as digits as its factorization.

1540987168673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4198875486.

The product of its (nonzero) digits is 60963840, while the sum is 65.

The spelling of 1540987168673 in words is "one trillion, five hundred forty billion, nine hundred eighty-seven million, one hundred sixty-eight thousand, six hundred seventy-three".