75511411021 has 4 divisors (see below), whose sum is σ = 78794515872. Its totient is φ = 72228306172.

The previous prime is 75511410983. The next prime is 75511411097. The reversal of 75511411021 is 12011411557.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 75511411021 - 2¹³ = 75511402829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75511411421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1641552391 + ... + 1641552436.

It is an arithmetic number, because the mean of its divisors is an integer number (19698628968).

Almost surely, 2^75511411021 is an apocalyptic number.

It is an amenable number.

75511411021 is a deficient number, since it is larger than the sum of its proper divisors (3283104851).

75511411021 is a wasteful number, since it uses less digits than its factorization.

75511411021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283104850.

The product of its (nonzero) digits is 1400, while the sum is 28.

Adding to 75511411021 its reverse (12011411557), we get a palindrome (87522822578).

The spelling of 75511411021 in words is "seventy-five billion, five hundred eleven million, four hundred eleven thousand, twenty-one".