2173150653920 has 192 divisors, whose sum is σ = 5443342248960. Its totient is φ = 818163929088.

The previous prime is 2173150653911. The next prime is 2173150653937. The reversal of 2173150653920 is 293560513712.

It is a Cunningham number, because it is equal to 1474161²-1.

It is a super-2 number, since 2×2173150653920² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117923747 + ... + 117942173.

It is an arithmetic number, because the mean of its divisors is an integer number (28350740880).

Almost surely, 2^{2173150653920} is an apocalyptic number.

2173150653920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2173150653920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2721671124480).

2173150653920 is an abundant number, since it is smaller than the sum of its proper divisors (3270191595040).

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

2173150653920 is a wasteful number, since it uses less digits than its factorization.

2173150653920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18977 (or 18969 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 44.

The spelling of 2173150653920 in words is "two trillion, one hundred seventy-three billion, one hundred fifty million, six hundred fifty-three thousand, nine hundred twenty".