161477634973 has 2 divisors, whose sum is σ = 161477634974. Its totient is φ = 161477634972.

The previous prime is 161477634907. The next prime is 161477634979. The reversal of 161477634973 is 379436774161.

161477634973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106783861284 + 54693773689 = 326778^2 + 233867^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161477634973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161477634979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80738817486 + 80738817487.

It is an arithmetic number, because the mean of its divisors is an integer number (80738817487).

Almost surely, 2^161477634973 is an apocalyptic number.

It is an amenable number.

161477634973 is a deficient number, since it is larger than the sum of its proper divisors (1).

161477634973 is an equidigital number, since it uses as much as digits as its factorization.

161477634973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16003008, while the sum is 58.

The spelling of 161477634973 in words is "one hundred sixty-one billion, four hundred seventy-seven million, six hundred thirty-four thousand, nine hundred seventy-three".