161540268701 has 16 divisors (see below), whose sum is σ = 187033760640. Its totient is φ = 136659508800.

The previous prime is 161540268691. The next prime is 161540268709. The reversal of 161540268701 is 107862045161.

161540268701 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161540268701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161540268709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136271 + ... + 584508.

It is an arithmetic number, because the mean of its divisors is an integer number (11689610040).

Almost surely, 2^161540268701 is an apocalyptic number.

It is an amenable number.

161540268701 is a deficient number, since it is larger than the sum of its proper divisors (25493491939).

161540268701 is a wasteful number, since it uses less digits than its factorization.

161540268701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721204.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 161540268701 in words is "one hundred sixty-one billion, five hundred forty million, two hundred sixty-eight thousand, seven hundred one".