78567261409 has 8 divisors (see below), whose sum is σ = 96698168000. Its totient is φ = 62163107856.

The previous prime is 78567261343. The next prime is 78567261449. The reversal of 78567261409 is 90416276587.

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 78567261409 - 2⁷ = 78567261281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78567261409.

It is not an unprimeable number, because it can be changed into a prime (78567261449) 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 7 ways as a sum of consecutive naturals, for example, 431688159 + ... + 431688340.

It is an arithmetic number, because the mean of its divisors is an integer number (12087271000).

Almost surely, 2^78567261409 is an apocalyptic number.

It is an amenable number.

78567261409 is a deficient number, since it is larger than the sum of its proper divisors (18130906591).

78567261409 is a wasteful number, since it uses less digits than its factorization.

78567261409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863376519.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 78567261409 in words is "seventy-eight billion, five hundred sixty-seven million, two hundred sixty-one thousand, four hundred nine".