4988478393549 has 18 divisors (see below), whose sum is σ = 8382001110990. Its totient is φ = 2850559081776.

The previous prime is 4988478393487. The next prime is 4988478393553. The reversal of 4988478393549 is 9453938748894.

4988478393549 is a `hidden beast` number, since 4 + 9 + 8 + 8 + 478 + 3 + 93 + 54 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3686757128649 + 1301721264900 = 1920093^2 + 1140930^2 .

It is not a de Polignac number, because 4988478393549 - 2⁷ = 4988478393421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4988478393589) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5655870754 + ... + 5655871635.

Almost surely, 2^{4988478393549} is an apocalyptic number.

4988478393549 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

4988478393549 is a deficient number, since it is larger than the sum of its proper divisors (3393522717441).

4988478393549 is a wasteful number, since it uses less digits than its factorization.

4988478393549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11311742409 (or 11311742399 counting only the distinct ones).

The product of its digits is 7524679680, while the sum is 81.

The spelling of 4988478393549 in words is "four trillion, nine hundred eighty-eight billion, four hundred seventy-eight million, three hundred ninety-three thousand, five hundred forty-nine".