2154241664320 has 56 divisors (see below), whose sum is σ = 5213882895048. Its totient is φ = 847570483200.

The previous prime is 2154241664299. The next prime is 2154241664339. The reversal of 2154241664320 is 234661424512.

It can be written as a sum of positive squares in 4 ways, for example, as 140499028224 + 2013742636096 = 374832^2 + 1419064^2 .

It is a super-2 number, since 2×2154241664320² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55160851 + ... + 55199890.

Almost surely, 2^{2154241664320} is an apocalyptic number.

2154241664320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2154241664320 is an abundant number, since it is smaller than the sum of its proper divisors (3059641230728).

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

2154241664320 is a wasteful number, since it uses less digits than its factorization.

2154241664320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110360819 (or 110360809 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 2154241664320 in words is "two trillion, one hundred fifty-four billion, two hundred forty-one million, six hundred sixty-four thousand, three hundred twenty".