163231340440 has 64 divisors (see below), whose sum is σ = 421078973760. Its totient is φ = 55786199040.

The previous prime is 163231340411. The next prime is 163231340449. The reversal of 163231340440 is 44043132361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163231340449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 843621 + ... + 1018900.

It is an arithmetic number, because the mean of its divisors is an integer number (6579358965).

Almost surely, 2^163231340440 is an apocalyptic number.

163231340440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163231340440 is an abundant number, since it is smaller than the sum of its proper divisors (257847633320).

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

163231340440 is a wasteful number, since it uses less digits than its factorization.

163231340440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862852 (or 1862848 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The spelling of 163231340440 in words is "one hundred sixty-three billion, two hundred thirty-one million, three hundred forty thousand, four hundred forty".