4517972121600 has 1440 divisors, whose sum is σ = 20133111398400. Its totient is φ = 978208358400.

The previous prime is 4517972121563. The next prime is 4517972121617. The reversal of 4517972121600 is 61212797154.

4517972121600 is a `hidden beast` number, since 4 + 5 + 17 + 9 + 7 + 2 + 1 + 21 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (1440).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 551573505 + ... + 551581695.

It is an arithmetic number, because the mean of its divisors is an integer number (13981327360).

Almost surely, 2^{4517972121600} is an apocalyptic number.

4517972121600 is a gapful number since it is divisible by the number (40) 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 4517972121600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10066555699200).

4517972121600 is an abundant number, since it is smaller than the sum of its proper divisors (15615139276800).

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

4517972121600 is a wasteful number, since it uses less digits than its factorization.

4517972121600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8261 (or 8227 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 4517972121600 in words is "four trillion, five hundred seventeen billion, nine hundred seventy-two million, one hundred twenty-one thousand, six hundred".