161402399929 has 2 divisors, whose sum is σ = 161402399930. Its totient is φ = 161402399928.

The previous prime is 161402399857. The next prime is 161402399981. The reversal of 161402399929 is 929993204161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155668124304 + 5734275625 = 394548^2 + 75725^2 .

It is a cyclic number.

It is not a de Polignac number, because 161402399929 - 2¹¹ = 161402397881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161402399929.

It is not a weakly prime, because it can be changed into another prime (161402399989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80701199964 + 80701199965.

It is an arithmetic number, because the mean of its divisors is an integer number (80701199965).

Almost surely, 2^161402399929 is an apocalyptic number.

It is an amenable number.

161402399929 is a deficient number, since it is larger than the sum of its proper divisors (1).

161402399929 is an equidigital number, since it uses as much as digits as its factorization.

161402399929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1889568, while the sum is 55.

The spelling of 161402399929 in words is "one hundred sixty-one billion, four hundred two million, three hundred ninety-nine thousand, nine hundred twenty-nine".