25454270646 has 96 divisors (see below), whose sum is σ = 66776306688. Its totient is φ = 6840840960.

The previous prime is 25454270641. The next prime is 25454270693. The reversal of 25454270646 is 64607245452.

25454270646 is a `hidden beast` number, since 2 + 545 + 42 + 7 + 0 + 64 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25454270641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6473301 + ... + 6477231.

It is an arithmetic number, because the mean of its divisors is an integer number (695586528).

Almost surely, 2^25454270646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25454270646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33388153344).

25454270646 is an abundant number, since it is smaller than the sum of its proper divisors (41322036042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25454270646 is a wasteful number, since it uses less digits than its factorization.

25454270646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6986 (or 6983 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 45.

The spelling of 25454270646 in words is "twenty-five billion, four hundred fifty-four million, two hundred seventy thousand, six hundred forty-six".