25505540500400 has 120 divisors (see below), whose sum is σ = 62213836330464. Its totient is φ = 10047344025600.

The previous prime is 25505540500373. The next prime is 25505540500439. The reversal of 25505540500400 is 400504550552.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5747072 + ... + 9167328.

Almost surely, 2^{25505540500400} is an apocalyptic number.

25505540500400 is a gapful number since it is divisible by the number (20) 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 25505540500400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31106918165232).

25505540500400 is an abundant number, since it is smaller than the sum of its proper divisors (36708295830064).

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

25505540500400 is a wasteful number, since it uses less digits than its factorization.

25505540500400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420559 (or 3420548 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 35.

The spelling of 25505540500400 in words is "twenty-five trillion, five hundred five billion, five hundred forty million, five hundred thousand, four hundred".