75520857 has 16 divisors (see below), whose sum is σ = 103530240. Its totient is φ = 48940752.

The previous prime is 75520853. The next prime is 75520871. The reversal of 75520857 is 75802557.

It is not a de Polignac number, because 75520857 - 2² = 75520853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75520853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27994 + ... + 30572.

It is an arithmetic number, because the mean of its divisors is an integer number (6470640).

Almost surely, 2^75520857 is an apocalyptic number.

It is an amenable number.

75520857 is a deficient number, since it is larger than the sum of its proper divisors (28009383).

75520857 is a wasteful number, since it uses less digits than its factorization.

75520857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2852.

The product of its (nonzero) digits is 98000, while the sum is 39.

The square root of 75520857 is about 8690.2737010983. The cubic root of 75520857 is about 422.6903209862.

It can be divided in two parts, 755 and 20857, that added together give a palindrome (21612).

The spelling of 75520857 in words is "seventy-five million, five hundred twenty thousand, eight hundred fifty-seven".