2505478673549 has 8 divisors (see below), whose sum is σ = 2513062782048. Its totient is φ = 2497905844560.

The previous prime is 2505478673479. The next prime is 2505478673563. The reversal of 2505478673549 is 9453768745052.

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 2505478673549 - 2³⁶ = 2436759196813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505478673149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2374847 + ... + 3263564.

It is an arithmetic number, because the mean of its divisors is an integer number (314132847756).

Almost surely, 2^{2505478673549} is an apocalyptic number.

It is an amenable number.

2505478673549 is a deficient number, since it is larger than the sum of its proper divisors (7584108499).

2505478673549 is an equidigital number, since it uses as much as digits as its factorization.

2505478673549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5639755.

The product of its (nonzero) digits is 254016000, while the sum is 65.

The spelling of 2505478673549 in words is "two trillion, five hundred five billion, four hundred seventy-eight million, six hundred seventy-three thousand, five hundred forty-nine".