787542268409 has 4 divisors (see below), whose sum is σ = 848122442916. Its totient is φ = 726962093904.

The previous prime is 787542268343. The next prime is 787542268411. The reversal of 787542268409 is 904862245787.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 386691204025 + 400851064384 = 621845^2 + 633128^2 .

It is a cyclic number.

It is not a de Polignac number, because 787542268409 - 2¹⁶ = 787542202873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (787542268309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30290087234 + ... + 30290087259.

It is an arithmetic number, because the mean of its divisors is an integer number (212030610729).

Almost surely, 2^787542268409 is an apocalyptic number.

It is an amenable number.

787542268409 is a deficient number, since it is larger than the sum of its proper divisors (60580174507).

787542268409 is a wasteful number, since it uses less digits than its factorization.

787542268409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60580174506.

The product of its (nonzero) digits is 54190080, while the sum is 62.

The spelling of 787542268409 in words is "seven hundred eighty-seven billion, five hundred forty-two million, two hundred sixty-eight thousand, four hundred nine".