1601156475123 has 4 divisors (see below), whose sum is σ = 2134875300168. Its totient is φ = 1067437650080.

The previous prime is 1601156475067. The next prime is 1601156475131. The reversal of 1601156475123 is 3215746511061.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1601156475123 - 2¹² = 1601156471027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1601156475823) 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, 266859412518 + ... + 266859412523.

It is an arithmetic number, because the mean of its divisors is an integer number (533718825042).

Almost surely, 2^{1601156475123} is an apocalyptic number.

1601156475123 is a deficient number, since it is larger than the sum of its proper divisors (533718825045).

1601156475123 is an equidigital number, since it uses as much as digits as its factorization.

1601156475123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533718825044.

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 1601156475123 in words is "one trillion, six hundred one billion, one hundred fifty-six million, four hundred seventy-five thousand, one hundred twenty-three".