75577579685 has 8 divisors (see below), whose sum is σ = 90714566520. Its totient is φ = 60447749824.

The previous prime is 75577579621. The next prime is 75577579687. The reversal of 75577579685 is 58697577557.

It can be written as a sum of positive squares in 4 ways, for example, as 31234906756 + 44342672929 = 176734^2 + 210577^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75577579685 - 2⁶ = 75577579621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75577579687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1765982 + ... + 1808271.

It is an arithmetic number, because the mean of its divisors is an integer number (11339320815).

Almost surely, 2^75577579685 is an apocalyptic number.

It is an amenable number.

75577579685 is a deficient number, since it is larger than the sum of its proper divisors (15136986835).

75577579685 is a wasteful number, since it uses less digits than its factorization.

75577579685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3578487.

The product of its digits is 648270000, while the sum is 71.

The spelling of 75577579685 in words is "seventy-five billion, five hundred seventy-seven million, five hundred seventy-nine thousand, six hundred eighty-five".