161764155452 has 24 divisors (see below), whose sum is σ = 299753675424. Its totient is φ = 76120699392.

The previous prime is 161764155433. The next prime is 161764155463. The reversal of 161764155452 is 254551467161.

It is a junction number, because it is equal to n+sod(n) for n = 161764155397 and 161764155406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1867568 + ... + 1952264.

It is an arithmetic number, because the mean of its divisors is an integer number (12489736476).

Almost surely, 2^161764155452 is an apocalyptic number.

It is an amenable number.

161764155452 is a deficient number, since it is larger than the sum of its proper divisors (137989519972).

161764155452 is a wasteful number, since it uses less digits than its factorization.

161764155452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112805 (or 112803 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 47.

The spelling of 161764155452 in words is "one hundred sixty-one billion, seven hundred sixty-four million, one hundred fifty-five thousand, four hundred fifty-two".