161387541495 has 24 divisors (see below), whose sum is σ = 279759480000. Its totient is φ = 86066870976.

The previous prime is 161387541443. The next prime is 161387541521. The reversal of 161387541495 is 594145783161.

161387541495 is a `hidden beast` number, since 1 + 6 + 1 + 3 + 8 + 7 + 541 + 4 + 95 = 666.

It is not a de Polignac number, because 161387541495 - 2¹⁰ = 161387540471 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 501861 + ... + 758049.

It is an arithmetic number, because the mean of its divisors is an integer number (11656645000).

Almost surely, 2^161387541495 is an apocalyptic number.

161387541495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161387541495 is a deficient number, since it is larger than the sum of its proper divisors (118371938505).

161387541495 is a wasteful number, since it uses less digits than its factorization.

161387541495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270199 (or 270196 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The spelling of 161387541495 in words is "one hundred sixty-one billion, three hundred eighty-seven million, five hundred forty-one thousand, four hundred ninety-five".