83782549989 has 40 divisors (see below), whose sum is σ = 128261853720. Its totient is φ = 54470361600.

The previous prime is 83782549987. The next prime is 83782549997. The reversal of 83782549989 is 98994528738.

83782549989 is a `hidden beast` number, since 8 + 3 + 78 + 2 + 549 + 9 + 8 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3461321889 + 80321228100 = 58833^2 + 283410^2 .

It is not a de Polignac number, because 83782549989 - 2¹ = 83782549987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83782549987) 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, 13044999 + ... + 13051419.

It is an arithmetic number, because the mean of its divisors is an integer number (3206546343).

Almost surely, 2^83782549989 is an apocalyptic number.

It is an amenable number.

83782549989 is a deficient number, since it is larger than the sum of its proper divisors (44479303731).

83782549989 is a wasteful number, since it uses less digits than its factorization.

83782549989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10403 (or 10394 counting only the distinct ones).

The product of its digits is 313528320, while the sum is 72.

The spelling of 83782549989 in words is "eighty-three billion, seven hundred eighty-two million, five hundred forty-nine thousand, nine hundred eighty-nine".