4391736620544 has 960 divisors, whose sum is σ = 16445377428480. Its totient is φ = 1139093176320.

The previous prime is 4391736620507. The next prime is 4391736620567. The reversal of 4391736620544 is 4450266371934.

4391736620544 is a `hidden beast` number, since 4 + 3 + 9 + 1 + 7 + 3 + 6 + 620 + 5 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 690630037 + ... + 690636395.

It is an arithmetic number, because the mean of its divisors is an integer number (17130601488).

Almost surely, 2^{4391736620544} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4391736620544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8222688714240).

4391736620544 is an abundant number, since it is smaller than the sum of its proper divisors (12053640807936).

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

4391736620544 is an equidigital number, since it uses as much as digits as its factorization.

4391736620544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6473 (or 6445 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 54.

The spelling of 4391736620544 in words is "four trillion, three hundred ninety-one billion, seven hundred thirty-six million, six hundred twenty thousand, five hundred forty-four".