75785732561 has 16 divisors (see below), whose sum is σ = 94497252480. Its totient is φ = 59046852480.

The previous prime is 75785732557. The next prime is 75785732563. The reversal of 75785732561 is 16523758757.

It is not a de Polignac number, because 75785732561 - 2² = 75785732557 is a prime.

It is a super-3 number, since 3×75785732561³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75785732497 and 75785732506.

It is not an unprimeable number, because it can be changed into a prime (75785732563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 655655 + ... + 762531.

It is an arithmetic number, because the mean of its divisors is an integer number (5906078280).

Almost surely, 2^75785732561 is an apocalyptic number.

It is an amenable number.

75785732561 is a deficient number, since it is larger than the sum of its proper divisors (18711519919).

75785732561 is a wasteful number, since it uses less digits than its factorization.

75785732561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116104.

The product of its digits is 12348000, while the sum is 56.

The spelling of 75785732561 in words is "seventy-five billion, seven hundred eighty-five million, seven hundred thirty-two thousand, five hundred sixty-one".