161744459387 has 8 divisors (see below), whose sum is σ = 184956635136. Its totient is φ = 138558739752.

The previous prime is 161744459381. The next prime is 161744459413. The reversal of 161744459387 is 783954447161.

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

It is a cyclic number.

It is not a de Polignac number, because 161744459387 - 2¹⁸ = 161744197243 is a prime.

It is a super-2 number, since 2×161744459387² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161744459381) 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, 6600923 + ... + 6625380.

It is an arithmetic number, because the mean of its divisors is an integer number (23119579392).

Almost surely, 2^161744459387 is an apocalyptic number.

161744459387 is a deficient number, since it is larger than the sum of its proper divisors (23212175749).

161744459387 is a wasteful number, since it uses less digits than its factorization.

161744459387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13228057.

The product of its digits is 20321280, while the sum is 59.

The spelling of 161744459387 in words is "one hundred sixty-one billion, seven hundred forty-four million, four hundred fifty-nine thousand, three hundred eighty-seven".