25553400771 has 4 divisors (see below), whose sum is σ = 34071201032. Its totient is φ = 17035600512.

The previous prime is 25553400739. The next prime is 25553400797. The reversal of 25553400771 is 17700435552.

It is a happy number.

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

It is not a de Polignac number, because 25553400771 - 2⁵ = 25553400739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25553405771) 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, 4258900126 + ... + 4258900131.

It is an arithmetic number, because the mean of its divisors is an integer number (8517800258).

Almost surely, 2^25553400771 is an apocalyptic number.

25553400771 is a deficient number, since it is larger than the sum of its proper divisors (8517800261).

25553400771 is an equidigital number, since it uses as much as digits as its factorization.

25553400771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8517800260.

The product of its (nonzero) digits is 147000, while the sum is 39.

The spelling of 25553400771 in words is "twenty-five billion, five hundred fifty-three million, four hundred thousand, seven hundred seventy-one".