10778785409 has 8 divisors (see below), whose sum is σ = 12492114048. Its totient is φ = 9108832320.

The previous prime is 10778785357. The next prime is 10778785411. The reversal of 10778785409 is 90458787701.

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

It is not a de Polignac number, because 10778785409 - 2⁸ = 10778785153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10778785609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10843352 + ... + 10844345.

It is an arithmetic number, because the mean of its divisors is an integer number (1561514256).

Almost surely, 2^10778785409 is an apocalyptic number.

It is an amenable number.

10778785409 is a deficient number, since it is larger than the sum of its proper divisors (1713328639).

10778785409 is an equidigital number, since it uses as much as digits as its factorization.

10778785409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21687775.

The product of its (nonzero) digits is 3951360, while the sum is 56.

The spelling of 10778785409 in words is "ten billion, seven hundred seventy-eight million, seven hundred eighty-five thousand, four hundred nine".