161190434977 has 32 divisors (see below), whose sum is σ = 190024458624. Its totient is φ = 134798515200.

The previous prime is 161190434959. The next prime is 161190435013. The reversal of 161190434977 is 779434091161.

It is a cyclic number.

It is not a de Polignac number, because 161190434977 - 2¹¹ = 161190432929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161190431977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86614027 + ... + 86615887.

It is an arithmetic number, because the mean of its divisors is an integer number (5938264332).

Almost surely, 2^161190434977 is an apocalyptic number.

It is an amenable number.

161190434977 is a deficient number, since it is larger than the sum of its proper divisors (28834023647).

161190434977 is a wasteful number, since it uses less digits than its factorization.

161190434977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3649.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The spelling of 161190434977 in words is "one hundred sixty-one billion, one hundred ninety million, four hundred thirty-four thousand, nine hundred seventy-seven".