161932054877 has 2 divisors, whose sum is σ = 161932054878. Its totient is φ = 161932054876.

The previous prime is 161932054873. The next prime is 161932054903. The reversal of 161932054877 is 778450239161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137823592516 + 24108462361 = 371246^2 + 155269^2 .

It is a cyclic number.

It is not a de Polignac number, because 161932054877 - 2² = 161932054873 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161932054873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80966027438 + 80966027439.

It is an arithmetic number, because the mean of its divisors is an integer number (80966027439).

It is a 2-persistent number, because it is pandigital, and so is 2⋅161932054877 = 323864109754, but 3⋅161932054877 = 485796164631 is not.

Almost surely, 2^161932054877 is an apocalyptic number.

It is an amenable number.

161932054877 is a deficient number, since it is larger than the sum of its proper divisors (1).

161932054877 is an equidigital number, since it uses as much as digits as its factorization.

161932054877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 161932054877 in words is "one hundred sixty-one billion, nine hundred thirty-two million, fifty-four thousand, eight hundred seventy-seven".