75195588628521 has 9 divisors (see below), whose sum is σ = 108615887817879. Its totient is φ = 50130375075936.

The previous prime is 75195588628507. The next prime is 75195588628583. The reversal of 75195588628521 is 12582688559157.

The square root of 75195588628521 is 8671539.

It is a perfect power (a square), and thus also a powerful number.

75195588628521 is a `hidden beast` number, since 7 + 5 + 1 + 9 + 558 + 8 + 62 + 8 + 5 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 32561688501225 + 42633900127296 = 5706285^2 + 6529464^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 75195588628521 - 2¹⁹ = 75195588104233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75195588628521.

It is not an unprimeable number, because it can be changed into a prime (75195588624521) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 24569361 + ... + 27459873.

Almost surely, 2^{75195588628521} is an apocalyptic number.

75195588628521 is the 8671539-th square number.

75195588628521 is the 4335770-th centered octagonal number.

It is an amenable number.

75195588628521 is a deficient number, since it is larger than the sum of its proper divisors (33420299189358).

75195588628521 is an frugal number, since it uses more digits than its factorization.

75195588628521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5781032 (or 2890516 counting only the distinct ones).

The product of its digits is 483840000, while the sum is 72.

The spelling of 75195588628521 in words is "seventy-five trillion, one hundred ninety-five billion, five hundred eighty-eight million, six hundred twenty-eight thousand, five hundred twenty-one".