25434491628 has 96 divisors (see below), whose sum is σ = 73451266560. Its totient is φ = 6670471680.

The previous prime is 25434491627. The next prime is 25434491629. The reversal of 25434491628 is 82619443452.

It is an interprime number because it is at equal distance from previous prime (25434491627) and next prime (25434491629).

It is not an unprimeable number, because it can be changed into a prime (25434491627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130408 + ... + 260528.

It is an arithmetic number, because the mean of its divisors is an integer number (765117360).

Almost surely, 2^25434491628 is an apocalyptic number.

25434491628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25434491628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36725633280).

25434491628 is an abundant number, since it is smaller than the sum of its proper divisors (48016774932).

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

25434491628 is a wasteful number, since it uses less digits than its factorization.

25434491628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130327 (or 130325 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 48.

The spelling of 25434491628 in words is "twenty-five billion, four hundred thirty-four million, four hundred ninety-one thousand, six hundred twenty-eight".