75857055049 has 4 divisors (see below), whose sum is σ = 77907245764. Its totient is φ = 73806864336.

The previous prime is 75857055047. The next prime is 75857055119. The reversal of 75857055049 is 94055075857.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54164183824 + 21692871225 = 232732^2 + 147285^2 .

It is a cyclic number.

It is not a de Polignac number, because 75857055049 - 2¹ = 75857055047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75857055047) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1025095302 + ... + 1025095375.

It is an arithmetic number, because the mean of its divisors is an integer number (19476811441).

Almost surely, 2^75857055049 is an apocalyptic number.

It is an amenable number.

75857055049 is a deficient number, since it is larger than the sum of its proper divisors (2050190715).

75857055049 is a wasteful number, since it uses less digits than its factorization.

75857055049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050190714.

The product of its (nonzero) digits is 8820000, while the sum is 55.

The spelling of 75857055049 in words is "seventy-five billion, eight hundred fifty-seven million, fifty-five thousand, forty-nine".