161245293280 has 24 divisors (see below), whose sum is σ = 380942005752. Its totient is φ = 64498117248.

The previous prime is 161245293221. The next prime is 161245293289. The reversal of 161245293280 is 82392542161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161245293289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503891382 + ... + 503891701.

It is an arithmetic number, because the mean of its divisors is an integer number (15872583573).

Almost surely, 2^161245293280 is an apocalyptic number.

161245293280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161245293280 is an abundant number, since it is smaller than the sum of its proper divisors (219696712472).

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

161245293280 is a wasteful number, since it uses less digits than its factorization.

161245293280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007783098 (or 1007783090 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 161245293280 in words is "one hundred sixty-one billion, two hundred forty-five million, two hundred ninety-three thousand, two hundred eighty".