75685421025 has 18 divisors (see below), whose sum is σ = 135560998950. Its totient is φ = 40365557760.

The previous prime is 75685420931. The next prime is 75685421033. The reversal of 75685421025 is 52012458657.

75685421025 is a `hidden beast` number, since 7 + 568 + 54 + 2 + 10 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1372480209 + 74312940816 = 37047^2 + 272604^2 .

It is not a de Polignac number, because 75685421025 - 2¹² = 75685416929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 168189600 + ... + 168190049.

Almost surely, 2^75685421025 is an apocalyptic number.

75685421025 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

75685421025 is a deficient number, since it is larger than the sum of its proper divisors (59875577925).

75685421025 is a wasteful number, since it uses less digits than its factorization.

75685421025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336379665 (or 336379657 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 45.

The spelling of 75685421025 in words is "seventy-five billion, six hundred eighty-five million, four hundred twenty-one thousand, twenty-five".