75782782505 has 8 divisors (see below), whose sum is σ = 91012862472. Its totient is φ = 60577210368.

The previous prime is 75782782463. The next prime is 75782782541. The reversal of 75782782505 is 50528728757.

It can be written as a sum of positive squares in 4 ways, for example, as 19520840089 + 56261942416 = 139717^2 + 237196^2 .

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 75782782505 - 2⁶ = 75782782441 is a prime.

It is a super-4 number, since 4×75782782505⁴ (a number of 45 digits) contains 4444 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6120152 + ... + 6132521.

It is an arithmetic number, because the mean of its divisors is an integer number (11376607809).

Almost surely, 2^75782782505 is an apocalyptic number.

It is an amenable number.

75782782505 is a deficient number, since it is larger than the sum of its proper divisors (15230079967).

75782782505 is a wasteful number, since it uses less digits than its factorization.

75782782505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12253915.

The product of its (nonzero) digits is 10976000, while the sum is 56.

The spelling of 75782782505 in words is "seventy-five billion, seven hundred eighty-two million, seven hundred eighty-two thousand, five hundred five".