161376434421 has 8 divisors (see below), whose sum is σ = 215170585920. Its totient is φ = 107583286272.

The previous prime is 161376434419. The next prime is 161376434447. The reversal of 161376434421 is 124434673161.

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

It is not a de Polignac number, because 161376434421 - 2¹ = 161376434419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161376434411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292725 + ... + 639093.

It is an arithmetic number, because the mean of its divisors is an integer number (26896323240).

Almost surely, 2^161376434421 is an apocalyptic number.

It is an amenable number.

161376434421 is a deficient number, since it is larger than the sum of its proper divisors (53794151499).

161376434421 is a wasteful number, since it uses less digits than its factorization.

161376434421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501675.

The product of its digits is 290304, while the sum is 42.

The spelling of 161376434421 in words is "one hundred sixty-one billion, three hundred seventy-six million, four hundred thirty-four thousand, four hundred twenty-one".