24747550545481 has 3 divisors (see below), whose sum is σ = 24747555520173. Its totient is φ = 24747545570790.

The previous prime is 24747550545479. The next prime is 24747550545493. The reversal of 24747550545481 is 18454505574742.

It is a happy number.

The square root of 24747550545481 is 4974691.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 24747550545481 - 2¹ = 24747550545479 is a prime.

It is a super-2 number, since 2×24747550545481² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24747550545451) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2487346 + ... + 7462036.

It is an arithmetic number, because the mean of its divisors is an integer number (8249185173391).

Almost surely, 2^{24747550545481} is an apocalyptic number.

24747550545481 is the 4974691-st square number.

24747550545481 is the 2487346-th centered octagonal number.

It is an amenable number.

24747550545481 is a deficient number, since it is larger than the sum of its proper divisors (4974692).

24747550545481 is an frugal number, since it uses more digits than its factorization.

24747550545481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9949382 (or 4974691 counting only the distinct ones).

The product of its (nonzero) digits is 125440000, while the sum is 61.

The spelling of 24747550545481 in words is "twenty-four trillion, seven hundred forty-seven billion, five hundred fifty million, five hundred forty-five thousand, four hundred eighty-one".