75432069720 has 384 divisors, whose sum is σ = 293154301440. Its totient is φ = 17087293440.

The previous prime is 75432069709. The next prime is 75432069749. The reversal of 75432069720 is 2796023457.

75432069720 is a `hidden beast` number, since 7 + 543 + 20 + 69 + 7 + 20 = 666.

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 95 ways as a sum of consecutive naturals, for example, 7683615 + ... + 7693425.

It is an arithmetic number, because the mean of its divisors is an integer number (763422660).

Almost surely, 2^75432069720 is an apocalyptic number.

75432069720 is a gapful number since it is divisible by the number (70) 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 75432069720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146577150720).

75432069720 is an abundant number, since it is smaller than the sum of its proper divisors (217722231720).

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

75432069720 is a wasteful number, since it uses less digits than its factorization.

75432069720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9957 (or 9941 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 75432069720 in words is "seventy-five billion, four hundred thirty-two million, sixty-nine thousand, seven hundred twenty".