25748995547521 has 8 divisors (see below), whose sum is σ = 27263740420224. Its totient is φ = 24234261572160.

The previous prime is 25748995547503. The next prime is 25748995547531. The reversal of 25748995547521 is 12574559984752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25748995547521 - 2²³ = 25748987158913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25748995547501) 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, 2417716 + ... + 7572538.

It is an arithmetic number, because the mean of its divisors is an integer number (3407967552528).

Almost surely, 2^{25748995547521} is an apocalyptic number.

It is an amenable number.

25748995547521 is a deficient number, since it is larger than the sum of its proper divisors (1514744872703).

25748995547521 is a wasteful number, since it uses less digits than its factorization.

25748995547521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5448671.

The product of its digits is 1270080000, while the sum is 73.

The spelling of 25748995547521 in words is "twenty-five trillion, seven hundred forty-eight billion, nine hundred ninety-five million, five hundred forty-seven thousand, five hundred twenty-one".