161877849 has 16 divisors (see below), whose sum is σ = 253339008. Its totient is φ = 90001152.

The previous prime is 161877827. The next prime is 161877857. The reversal of 161877849 is 948778161.

161877849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161877849 - 2⁷ = 161877721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161877899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103392 + ... + 104945.

It is an arithmetic number, because the mean of its divisors is an integer number (15833688).

Almost surely, 2^161877849 is an apocalyptic number.

It is an amenable number.

161877849 is a deficient number, since it is larger than the sum of its proper divisors (91461159).

161877849 is a wasteful number, since it uses less digits than its factorization.

161877849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208384.

The product of its digits is 677376, while the sum is 51.

The square root of 161877849 is about 12723.1226120006. The cubic root of 161877849 is about 544.9991291404. Note that the first 3 decimals are identical.

The spelling of 161877849 in words is "one hundred sixty-one million, eight hundred seventy-seven thousand, eight hundred forty-nine".