75121199384 has 128 divisors (see below), whose sum is σ = 185418547200. Its totient is φ = 27642384000.

The previous prime is 75121199357. The next prime is 75121199429. The reversal of 75121199384 is 48399112157.

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, 3864329 + ... + 3883719.

It is an arithmetic number, because the mean of its divisors is an integer number (1448582400).

Almost surely, 2^75121199384 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 75121199384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92709273600).

75121199384 is an abundant number, since it is smaller than the sum of its proper divisors (110297347816).

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

75121199384 is a wasteful number, since it uses less digits than its factorization.

75121199384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19765 (or 19761 counting only the distinct ones).

The product of its digits is 544320, while the sum is 50.

The spelling of 75121199384 in words is "seventy-five billion, one hundred twenty-one million, one hundred ninety-nine thousand, three hundred eighty-four".