74474000649 has 24 divisors (see below), whose sum is σ = 108033798600. Its totient is φ = 49437123840.

The previous prime is 74474000633. The next prime is 74474000687. The reversal of 74474000649 is 94600047447.

It can be written as a sum of positive squares in 4 ways, for example, as 17448560649 + 57025440000 = 132093^2 + 238800^2 .

It is not a de Polignac number, because 74474000649 - 2⁴ = 74474000633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74474050649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4904629 + ... + 4919789.

It is an arithmetic number, because the mean of its divisors is an integer number (4501408275).

Almost surely, 2^74474000649 is an apocalyptic number.

It is an amenable number.

74474000649 is a deficient number, since it is larger than the sum of its proper divisors (33559797951).

74474000649 is a wasteful number, since it uses less digits than its factorization.

74474000649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17465 (or 17462 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 74474000649 in words is "seventy-four billion, four hundred seventy-four million, six hundred forty-nine", and thus it is an aban number.