74390832649 has 16 divisors (see below), whose sum is σ = 88267944960. Its totient is φ = 61349964480.

The previous prime is 74390832643. The next prime is 74390832653. The reversal of 74390832649 is 94623809347.

It is a happy number.

It is not a de Polignac number, because 74390832649 - 2²¹ = 74388735497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74390832649.

It is not an unprimeable number, because it can be changed into a prime (74390832643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 953254 + ... + 1028335.

It is an arithmetic number, because the mean of its divisors is an integer number (5516746560).

Almost surely, 2^74390832649 is an apocalyptic number.

It is an amenable number.

74390832649 is a deficient number, since it is larger than the sum of its proper divisors (13877112311).

74390832649 is a wasteful number, since it uses less digits than its factorization.

74390832649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981800.

The product of its (nonzero) digits is 7838208, while the sum is 55.

The spelling of 74390832649 in words is "seventy-four billion, three hundred ninety million, eight hundred thirty-two thousand, six hundred forty-nine".