16180722381 has 8 divisors (see below), whose sum is σ = 21638316544. Its totient is φ = 10755138240.

The previous prime is 16180722379. The next prime is 16180722391. The reversal of 16180722381 is 18322708161.

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

It is not a de Polignac number, because 16180722381 - 2¹ = 16180722379 is a prime.

It is a super-2 number, since 2×16180722381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16180722301) 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, 8001325 + ... + 8003346.

It is an arithmetic number, because the mean of its divisors is an integer number (2704789568).

Almost surely, 2^16180722381 is an apocalyptic number.

It is an amenable number.

16180722381 is a deficient number, since it is larger than the sum of its proper divisors (5457594163).

16180722381 is a wasteful number, since it uses less digits than its factorization.

16180722381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16005011.

The product of its (nonzero) digits is 32256, while the sum is 39.

The spelling of 16180722381 in words is "sixteen billion, one hundred eighty million, seven hundred twenty-two thousand, three hundred eighty-one".