161277476871 has 48 divisors (see below), whose sum is σ = 259202803200. Its totient is φ = 88875626112.

The previous prime is 161277476869. The next prime is 161277476887. The reversal of 161277476871 is 178674772161.

It is not a de Polignac number, because 161277476871 - 2¹ = 161277476869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161277476831) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 337875 + ... + 660843.

It is an arithmetic number, because the mean of its divisors is an integer number (5400058400).

Almost surely, 2^161277476871 is an apocalyptic number.

161277476871 is a deficient number, since it is larger than the sum of its proper divisors (97925326329).

161277476871 is a wasteful number, since it uses less digits than its factorization.

161277476871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323108 (or 323101 counting only the distinct ones).

The product of its digits is 5531904, while the sum is 57.

The spelling of 161277476871 in words is "one hundred sixty-one billion, two hundred seventy-seven million, four hundred seventy-six thousand, eight hundred seventy-one".