161043771402 has 32 divisors (see below), whose sum is σ = 361564492800. Its totient is φ = 53127840384.

The previous prime is 161043771359. The next prime is 161043771403. The reversal of 161043771402 is 204177340161.

161043771402 is a `hidden beast` number, since 1 + 610 + 4 + 37 + 7 + 1 + 4 + 0 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (161043771403) 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, 15367402 + ... + 15377877.

It is an arithmetic number, because the mean of its divisors is an integer number (11298890400).

Almost surely, 2^161043771402 is an apocalyptic number.

161043771402 is an abundant number, since it is smaller than the sum of its proper divisors (200520721398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161043771402 is a wasteful number, since it uses less digits than its factorization.

161043771402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30745387 (or 30745381 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The spelling of 161043771402 in words is "one hundred sixty-one billion, forty-three million, seven hundred seventy-one thousand, four hundred two".