25417787652640 has 48 divisors (see below), whose sum is σ = 60049833883200. Its totient is φ = 10167062480640.

The previous prime is 25417787652629. The next prime is 25417787652641. The reversal of 25417787652640 is 4625678771452.

It is not an unprimeable number, because it can be changed into a prime (25417787652641) 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, 49564261 + ... + 50074459.

It is an arithmetic number, because the mean of its divisors is an integer number (1251038205900).

Almost surely, 2^{25417787652640} is an apocalyptic number.

25417787652640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25417787652640 is an abundant number, since it is smaller than the sum of its proper divisors (34632046230560).

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

25417787652640 is a wasteful number, since it uses less digits than its factorization.

25417787652640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821585 (or 821577 counting only the distinct ones).

The product of its (nonzero) digits is 158054400, while the sum is 64.

The spelling of 25417787652640 in words is "twenty-five trillion, four hundred seventeen billion, seven hundred eighty-seven million, six hundred fifty-two thousand, six hundred forty".