25451616 has 48 divisors (see below), whose sum is σ = 69721344. Its totient is φ = 8114304.

The previous prime is 25451599. The next prime is 25451617. The reversal of 25451616 is 61615452.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×25451616² = 1295569514022912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25451617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3556 + ... + 7971.

It is an arithmetic number, because the mean of its divisors is an integer number (1452528).

Almost surely, 2^25451616 is an apocalyptic number.

It is an amenable number.

25451616 is an abundant number, since it is smaller than the sum of its proper divisors (44269728).

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

25451616 is a wasteful number, since it uses less digits than its factorization.

25451616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11563 (or 11555 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 25451616 is about 5044.9594646538. The cubic root of 25451616 is about 294.1519876828.

The spelling of 25451616 in words is "twenty-five million, four hundred fifty-one thousand, six hundred sixteen".