25553351062640 has 80 divisors (see below), whose sum is σ = 59561787057600. Its totient is φ = 10195495888896.

The previous prime is 25553351062511. The next prime is 25553351062661. The reversal of 25553351062640 is 4626015335552.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514758941 + ... + 514808579.

It is an arithmetic number, because the mean of its divisors is an integer number (744522338220).

Almost surely, 2^{25553351062640} is an apocalyptic number.

25553351062640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25553351062640 is an abundant number, since it is smaller than the sum of its proper divisors (34008435994960).

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

25553351062640 is a wasteful number, since it uses less digits than its factorization.

25553351062640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65794 (or 65788 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 47.

The spelling of 25553351062640 in words is "twenty-five trillion, five hundred fifty-three billion, three hundred fifty-one million, sixty-two thousand, six hundred forty".