161455250452 has 24 divisors (see below), whose sum is σ = 286890690240. Its totient is φ = 79489374720.

The previous prime is 161455250447. The next prime is 161455250461. The reversal of 161455250452 is 254052554161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137677 + ... + 584692.

It is an arithmetic number, because the mean of its divisors is an integer number (11953778760).

Almost surely, 2^161455250452 is an apocalyptic number.

It is an amenable number.

161455250452 is a deficient number, since it is larger than the sum of its proper divisors (125435439788).

161455250452 is a wasteful number, since it uses less digits than its factorization.

161455250452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723231 (or 723229 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 161455250452 in words is "one hundred sixty-one billion, four hundred fifty-five million, two hundred fifty thousand, four hundred fifty-two".