161321211363152 has 20 divisors (see below), whose sum is σ = 319210056528576. Its totient is φ = 78944422581600.

The previous prime is 161321211363113. The next prime is 161321211363181. The reversal of 161321211363152 is 251363112123161.

161321211363152 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 107261442974 + ... + 107261444477.

Almost surely, 2^{161321211363152} is an apocalyptic number.

It is an amenable number.

161321211363152 is a deficient number, since it is larger than the sum of its proper divisors (157888845165424).

161321211363152 is a wasteful number, since it uses less digits than its factorization.

161321211363152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214522887506 (or 214522887500 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The spelling of 161321211363152 in words is "one hundred sixty-one trillion, three hundred twenty-one billion, two hundred eleven million, three hundred sixty-three thousand, one hundred fifty-two".