75546370449 has 27 divisors (see below), whose sum is σ = 119959007259. Its totient is φ = 45780181920.

The previous prime is 75546370411. The next prime is 75546370519. The reversal of 75546370449 is 94407364557.

The square root of 75546370449 is 274857.

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

75546370449 is a `hidden beast` number, since 75 + 5 + 4 + 63 + 70 + 449 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9291610449 + 66254760000 = 96393^2 + 257400^2 .

It is not a de Polignac number, because 75546370449 - 2⁹ = 75546369937 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 75546370395 and 75546370404.

It is not an unprimeable number, because it can be changed into a prime (75546372449) 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, 9066117 + ... + 9074445.

Almost surely, 2^75546370449 is an apocalyptic number.

75546370449 is the 274857-th square number.

75546370449 is the 137429-th centered octagonal number.

It is an amenable number.

75546370449 is a deficient number, since it is larger than the sum of its proper divisors (44412636810).

75546370449 is an frugal number, since it uses more digits than its factorization.

75546370449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16686 (or 8343 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 54.

The spelling of 75546370449 in words is "seventy-five billion, five hundred forty-six million, three hundred seventy thousand, four hundred forty-nine".