39581213049 has 24 divisors (see below), whose sum is σ = 65346345792. Its totient is φ = 22615783200.

The previous prime is 39581212997. The next prime is 39581213051. The reversal of 39581213049 is 94031218593.

It is a happy number.

39581213049 is a `hidden beast` number, since 3 + 9 + 581 + 21 + 3 + 0 + 49 = 666.

It is not a de Polignac number, because 39581213049 - 2⁷ = 39581212921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39581212995 and 39581213013.

It is not an unprimeable number, because it can be changed into a prime (39581213069) 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 23 ways as a sum of consecutive naturals, for example, 919099 + ... + 961199.

It is an arithmetic number, because the mean of its divisors is an integer number (2722764408).

Almost surely, 2^39581213049 is an apocalyptic number.

It is an amenable number.

39581213049 is a deficient number, since it is larger than the sum of its proper divisors (25765132743).

39581213049 is a wasteful number, since it uses less digits than its factorization.

39581213049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57037 (or 57034 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 39581213049 in words is "thirty-nine billion, five hundred eighty-one million, two hundred thirteen thousand, forty-nine".