38782655649 has 6 divisors (see below), whose sum is σ = 56019391506. Its totient is φ = 25855103760.

The previous prime is 38782655573. The next prime is 38782655651. The reversal of 38782655649 is 94655628783.

It is a happy number.

38782655649 is a `hidden beast` number, since 3 + 8 + 7 + 8 + 2 + 65 + 564 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 37227773025 + 1554882624 = 192945^2 + 39432^2 .

It is not a de Polignac number, because 38782655649 - 2⁹ = 38782655137 is a prime.

It is a super-2 number, since 2×38782655649² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38782655749) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2154591972 + ... + 2154591989.

It is an arithmetic number, because the mean of its divisors is an integer number (9336565251).

Almost surely, 2^38782655649 is an apocalyptic number.

It is an amenable number.

38782655649 is a deficient number, since it is larger than the sum of its proper divisors (17236735857).

38782655649 is a wasteful number, since it uses less digits than its factorization.

38782655649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309183967 (or 4309183964 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 63.

It can be divided in two parts, 38782 and 655649, that added together give a triangular number (694431 = T₁₁₇₈).

The spelling of 38782655649 in words is "thirty-eight billion, seven hundred eighty-two million, six hundred fifty-five thousand, six hundred forty-nine".