25778450477 has 8 divisors (see below), whose sum is σ = 27762702240. Its totient is φ = 23794383600.

The previous prime is 25778450459. The next prime is 25778450491. The reversal of 25778450477 is 77405487752.

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

It is not a de Polignac number, because 25778450477 - 2¹⁴ = 25778434093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25778410477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410774 + ... + 469352.

It is an arithmetic number, because the mean of its divisors is an integer number (3470337780).

Almost surely, 2^25778450477 is an apocalyptic number.

It is an amenable number.

25778450477 is a deficient number, since it is larger than the sum of its proper divisors (1984251763).

25778450477 is a wasteful number, since it uses less digits than its factorization.

25778450477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92443.

The product of its (nonzero) digits is 15366400, while the sum is 56.

The spelling of 25778450477 in words is "twenty-five billion, seven hundred seventy-eight million, four hundred fifty thousand, four hundred seventy-seven".