6249386549781 has 8 divisors (see below), whose sum is σ = 9258350444160. Its totient is φ = 4166257699836.

The previous prime is 6249386549657. The next prime is 6249386549807. The reversal of 6249386549781 is 1879456839426.

6249386549781 is a `hidden beast` number, since 6 + 2 + 4 + 9 + 3 + 8 + 6 + 549 + 78 + 1 = 666.

6249386549781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6249386549781 - 2³⁴ = 6232206680597 is a prime.

It is a super-2 number, since 2×6249386549781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6249386549981) 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, 115729380525 + ... + 115729380578.

It is an arithmetic number, because the mean of its divisors is an integer number (1157293805520).

Almost surely, 2^{6249386549781} is an apocalyptic number.

It is an amenable number.

6249386549781 is a deficient number, since it is larger than the sum of its proper divisors (3008963894379).

6249386549781 is a wasteful number, since it uses less digits than its factorization.

6249386549781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231458761112 (or 231458761106 counting only the distinct ones).

The product of its digits is 627056640, while the sum is 72.

The spelling of 6249386549781 in words is "six trillion, two hundred forty-nine billion, three hundred eighty-six million, five hundred forty-nine thousand, seven hundred eighty-one".