75550401 has 24 divisors (see below), whose sum is σ = 114747360. Its totient is φ = 49665312.

The previous prime is 75550381. The next prime is 75550417. The reversal of 75550401 is 10405557.

75550401 is a `hidden beast` number, since 75 + 550 + 40 + 1 = 666.

It is not a de Polignac number, because 75550401 - 2⁵ = 75550369 is a prime.

It is a super-3 number, since 3×75550401³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (75550001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15610 + ... + 19868.

It is an arithmetic number, because the mean of its divisors is an integer number (4781140).

Almost surely, 2^75550401 is an apocalyptic number.

It is an amenable number.

75550401 is a deficient number, since it is larger than the sum of its proper divisors (39196959).

75550401 is an equidigital number, since it uses as much as digits as its factorization.

75550401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4347 (or 4335 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 75550401 is about 8691.9733662730. The cubic root of 75550401 is about 422.7454330671.

Adding to 75550401 its reverse (10405557), we get a palindrome (85955958).

The spelling of 75550401 in words is "seventy-five million, five hundred fifty thousand, four hundred one".