5405778525391 has 4 divisors (see below), whose sum is σ = 5486461787032. Its totient is φ = 5325095263752.

The previous prime is 5405778525379. The next prime is 5405778525431. The reversal of 5405778525391 is 1935258775045.

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

It is a cyclic number.

It is not a de Polignac number, because 5405778525391 - 2⁹ = 5405778524879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5405748525391) 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, 40341630720 + ... + 40341630853.

It is an arithmetic number, because the mean of its divisors is an integer number (1371615446758).

Almost surely, 2^{5405778525391} is an apocalyptic number.

5405778525391 is a deficient number, since it is larger than the sum of its proper divisors (80683261641).

5405778525391 is an equidigital number, since it uses as much as digits as its factorization.

5405778525391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80683261640.

The product of its (nonzero) digits is 52920000, while the sum is 61.

The spelling of 5405778525391 in words is "five trillion, four hundred five billion, seven hundred seventy-eight million, five hundred twenty-five thousand, three hundred ninety-one".