75780137786 has 8 divisors (see below), whose sum is σ = 113674132020. Its totient is φ = 37888760448.

The previous prime is 75780137773. The next prime is 75780137789. The reversal of 75780137786 is 68773108757.

It can be written as a sum of positive squares in 2 ways, for example, as 74958226225 + 821911561 = 273785^2 + 28669^2 .

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

It is not an unprimeable number, because it can be changed into a prime (75780137789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 580151 + ... + 698666.

Almost surely, 2^75780137786 is an apocalyptic number.

75780137786 is a deficient number, since it is larger than the sum of its proper divisors (37893994234).

75780137786 is a wasteful number, since it uses less digits than its factorization.

75780137786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308448.

The product of its (nonzero) digits is 13829760, while the sum is 59.

The spelling of 75780137786 in words is "seventy-five billion, seven hundred eighty million, one hundred thirty-seven thousand, seven hundred eighty-six".