75509516987 has 4 divisors (see below), whose sum is σ = 75510089160. Its totient is φ = 75508944816.

The previous prime is 75509516977. The next prime is 75509517029. The reversal of 75509516987 is 78961590557.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 75509516987 - 2²⁴ = 75492739771 is a prime.

It is a super-2 number, since 2×75509516987² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75509516917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23648 + ... + 389330.

It is an arithmetic number, because the mean of its divisors is an integer number (18877522290).

Almost surely, 2^75509516987 is an apocalyptic number.

75509516987 is a deficient number, since it is larger than the sum of its proper divisors (572173).

75509516987 is a wasteful number, since it uses less digits than its factorization.

75509516987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572172.

The product of its (nonzero) digits is 23814000, while the sum is 62.

The spelling of 75509516987 in words is "seventy-five billion, five hundred nine million, five hundred sixteen thousand, nine hundred eighty-seven".