75637650529 has 27 divisors (see below), whose sum is σ = 89095470681. Its totient is φ = 64025354400.

The previous prime is 75637650509. The next prime is 75637650551. The reversal of 75637650529 is 92505673657.

The square root of 75637650529 is 275023.

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

It can be written as a sum of positive squares in 4 ways, for example, as 6951724129 + 68685926400 = 83377^2 + 262080^2 .

It is not a de Polignac number, because 75637650529 - 2¹⁷ = 75637519457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75637650529.

It is not an unprimeable number, because it can be changed into a prime (75637650509) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 194441067 + ... + 194441455.

Almost surely, 2^75637650529 is an apocalyptic number.

75637650529 is the 275023-rd square number.

75637650529 is the 137512-nd centered octagonal number.

It is an amenable number.

75637650529 is a deficient number, since it is larger than the sum of its proper divisors (13457820152).

75637650529 is an frugal number, since it uses more digits than its factorization.

75637650529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 11907000, while the sum is 55.

The spelling of 75637650529 in words is "seventy-five billion, six hundred thirty-seven million, six hundred fifty thousand, five hundred twenty-nine".