75549498961 has 4 divisors (see below), whose sum is σ = 79525788400. Its totient is φ = 71573209524.

The previous prime is 75549498949. The next prime is 75549498967. The reversal of 75549498961 is 16989494557.

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 75549498961 - 2⁷ = 75549498833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75549498967) 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, 1988144691 + ... + 1988144728.

It is an arithmetic number, because the mean of its divisors is an integer number (19881447100).

Almost surely, 2^75549498961 is an apocalyptic number.

It is an amenable number.

75549498961 is a deficient number, since it is larger than the sum of its proper divisors (3976289439).

75549498961 is a wasteful number, since it uses less digits than its factorization.

75549498961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3976289438.

The product of its digits is 97977600, while the sum is 67.

The spelling of 75549498961 in words is "seventy-five billion, five hundred forty-nine million, four hundred ninety-eight thousand, nine hundred sixty-one".