320220161457 has 48 divisors (see below), whose sum is σ = 516794451840. Its totient is φ = 172563906816.

The previous prime is 320220161447. The next prime is 320220161461. The reversal of 320220161457 is 754161022023.

It is not a de Polignac number, because 320220161457 - 2⁸ = 320220161201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320220161447) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 983853 + ... + 1268229.

It is an arithmetic number, because the mean of its divisors is an integer number (10766551080).

Almost surely, 2^320220161457 is an apocalyptic number.

It is an amenable number.

320220161457 is a deficient number, since it is larger than the sum of its proper divisors (196574290383).

320220161457 is a wasteful number, since it uses less digits than its factorization.

320220161457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284502 (or 284459 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The spelling of 320220161457 in words is "three hundred twenty billion, two hundred twenty million, one hundred sixty-one thousand, four hundred fifty-seven".