25651680 has 48 divisors (see below), whose sum is σ = 80804304. Its totient is φ = 6840320.

The previous prime is 25651673. The next prime is 25651699. The reversal of 25651680 is 8615652.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26241 + ... + 27200.

It is an arithmetic number, because the mean of its divisors is an integer number (1683423).

Almost surely, 2^25651680 is an apocalyptic number.

25651680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25651680 is an abundant number, since it is smaller than the sum of its proper divisors (55152624).

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

25651680 is a wasteful number, since it uses less digits than its factorization.

25651680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53459 (or 53451 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 25651680 is about 5064.7487598103. The cubic root of 25651680 is about 294.9207102811.

The spelling of 25651680 in words is "twenty-five million, six hundred fifty-one thousand, six hundred eighty".