775136505 has 128 divisors (see below), whose sum is σ = 1598123520. Its totient is φ = 314818560.

The previous prime is 775136489. The next prime is 775136507. The reversal of 775136505 is 505631577.

It is a happy number.

It is not a de Polignac number, because 775136505 - 2⁴ = 775136489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (775136507) 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 127 ways as a sum of consecutive naturals, for example, 1057119 + ... + 1057851.

It is an arithmetic number, because the mean of its divisors is an integer number (12485340).

Almost surely, 2^775136505 is an apocalyptic number.

It is an amenable number.

775136505 is an abundant number, since it is smaller than the sum of its proper divisors (822987015).

775136505 is a wasteful number, since it uses less digits than its factorization.

775136505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811.

The product of its (nonzero) digits is 110250, while the sum is 39.

The square root of 775136505 is about 27841.2734083770. The cubic root of 775136505 is about 918.5992013133.

The spelling of 775136505 in words is "seven hundred seventy-five million, one hundred thirty-six thousand, five hundred five".