40029378849 has 16 divisors (see below), whose sum is σ = 59561756800. Its totient is φ = 26569714608.

The previous prime is 40029378799. The next prime is 40029378869. The reversal of 40029378849 is 94887392004.

40029378849 is a `hidden beast` number, since 400 + 2 + 93 + 78 + 84 + 9 = 666.

It is not a de Polignac number, because 40029378849 - 2¹⁵ = 40029346081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40029378795 and 40029378804.

It is not an unprimeable number, because it can be changed into a prime (40029378869) 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 15 ways as a sum of consecutive naturals, for example, 3230869 + ... + 3243234.

It is an arithmetic number, because the mean of its divisors is an integer number (3722609800).

Almost surely, 2^40029378849 is an apocalyptic number.

It is an amenable number.

40029378849 is a deficient number, since it is larger than the sum of its proper divisors (19532377951).

40029378849 is a wasteful number, since it uses less digits than its factorization.

40029378849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6474341 (or 6474335 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 40029378849 in words is "forty billion, twenty-nine million, three hundred seventy-eight thousand, eight hundred forty-nine".