163520551964 has 24 divisors (see below), whose sum is σ = 356772114048. Its totient is φ = 63709305840.

The previous prime is 163520551963. The next prime is 163520551969. The reversal of 163520551964 is 469155025361.

It is a super-2 number, since 2×163520551964² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163520551963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265455134 + ... + 265455749.

It is an arithmetic number, because the mean of its divisors is an integer number (14865504752).

Almost surely, 2^163520551964 is an apocalyptic number.

163520551964 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

163520551964 is an abundant number, since it is smaller than the sum of its proper divisors (193251562084).

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

163520551964 is a wasteful number, since it uses less digits than its factorization.

163520551964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530910905 (or 530910903 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 163520551964 in words is "one hundred sixty-three billion, five hundred twenty million, five hundred fifty-one thousand, nine hundred sixty-four".