169152138720 has 144 divisors (see below), whose sum is σ = 591310701072. Its totient is φ = 44007045120.

The previous prime is 169152138709. The next prime is 169152138721. The reversal of 169152138720 is 27831251961.

169152138720 is a `hidden beast` number, since 1 + 6 + 91 + 521 + 38 + 7 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×169152138720² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169152138721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1373482 + ... + 1491561.

It is an arithmetic number, because the mean of its divisors is an integer number (4106324313).

Almost surely, 2^169152138720 is an apocalyptic number.

169152138720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

169152138720 is an abundant number, since it is smaller than the sum of its proper divisors (422158562352).

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

169152138720 is a wasteful number, since it uses less digits than its factorization.

169152138720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865105 (or 2865094 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 169152138720 in words is "one hundred sixty-nine billion, one hundred fifty-two million, one hundred thirty-eight thousand, seven hundred twenty".