6399741620574 has 96 divisors (see below), whose sum is σ = 14735515092480. Its totient is φ = 2001665385216.

The previous prime is 6399741620549. The next prime is 6399741620603. The reversal of 6399741620574 is 4750261479936.

6399741620574 is a `hidden beast` number, since 6 + 3 + 9 + 9 + 7 + 416 + 205 + 7 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55089819 + ... + 55205865.

It is an arithmetic number, because the mean of its divisors is an integer number (153494948880).

Almost surely, 2^{6399741620574} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6399741620574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7367757546240).

6399741620574 is an abundant number, since it is smaller than the sum of its proper divisors (8335773471906).

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

6399741620574 is a wasteful number, since it uses less digits than its factorization.

6399741620574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117614 (or 117611 counting only the distinct ones).

The product of its (nonzero) digits is 68584320, while the sum is 63.

The spelling of 6399741620574 in words is "six trillion, three hundred ninety-nine billion, seven hundred forty-one million, six hundred twenty thousand, five hundred seventy-four".