75508994520 has 192 divisors, whose sum is σ = 260427960000. Its totient is φ = 18908381184.

The previous prime is 75508994489. The next prime is 75508994593. The reversal of 75508994520 is 2549980557.

75508994520 is a `hidden beast` number, since 7 + 5 + 508 + 99 + 45 + 2 + 0 = 666.

It is a Cunningham number, because it is equal to 274789²-1.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2734141 + ... + 2761619.

It is an arithmetic number, because the mean of its divisors is an integer number (1356395625).

Almost surely, 2^75508994520 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 75508994520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130213980000).

75508994520 is an abundant number, since it is smaller than the sum of its proper divisors (184918965480).

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

75508994520 is a wasteful number, since it uses less digits than its factorization.

75508994520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27962 (or 27955 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 54.

The spelling of 75508994520 in words is "seventy-five billion, five hundred eight million, nine hundred ninety-four thousand, five hundred twenty".