6538442117949 has 40 divisors (see below), whose sum is σ = 11163356075520. Its totient is φ = 3736010062944.

The previous prime is 6538442117939. The next prime is 6538442117951. The reversal of 6538442117949 is 9497112448356.

6538442117949 is a `hidden beast` number, since 6 + 5 + 38 + 4 + 421 + 179 + 4 + 9 = 666.

It is not a de Polignac number, because 6538442117949 - 2⁸ = 6538442117693 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6538442117929) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8554132 + ... + 9287090.

It is an arithmetic number, because the mean of its divisors is an integer number (279083901888).

Almost surely, 2^{6538442117949} is an apocalyptic number.

It is an amenable number.

6538442117949 is a deficient number, since it is larger than the sum of its proper divisors (4624913957571).

6538442117949 is a wasteful number, since it uses less digits than its factorization.

6538442117949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748711 (or 748702 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The spelling of 6538442117949 in words is "six trillion, five hundred thirty-eight billion, four hundred forty-two million, one hundred seventeen thousand, nine hundred forty-nine".