161381032487 has 16 divisors (see below), whose sum is σ = 173233341792. Its totient is φ = 149797232640.

The previous prime is 161381032471. The next prime is 161381032493. The reversal of 161381032487 is 784230183161.

It is not a de Polignac number, because 161381032487 - 2⁴ = 161381032471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161381032427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 715037 + ... + 913257.

It is an arithmetic number, because the mean of its divisors is an integer number (10827083862).

Almost surely, 2^161381032487 is an apocalyptic number.

161381032487 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

161381032487 is a deficient number, since it is larger than the sum of its proper divisors (11852309305).

161381032487 is a wasteful number, since it uses less digits than its factorization.

161381032487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198898.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 161381032487 in words is "one hundred sixty-one billion, three hundred eighty-one million, thirty-two thousand, four hundred eighty-seven".