7474000644 has 72 divisors (see below), whose sum is σ = 20708032800. Its totient is φ = 2254089600.

The previous prime is 7474000631. The next prime is 7474000663. The reversal of 7474000644 is 4460004747.

7474000644 is a `hidden beast` number, since 7 + 4 + 7 + 4 + 0 + 0 + 0 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 7474000599 and 7474000608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38832 + ... + 128280.

Almost surely, 2^7474000644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7474000644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10354016400).

7474000644 is an abundant number, since it is smaller than the sum of its proper divisors (13234032156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7474000644 is a wasteful number, since it uses less digits than its factorization.

7474000644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89681 (or 89676 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 36.

The square root of 7474000644 is about 86452.3027108012. The cubic root of 7474000644 is about 1955.1693343905.

The spelling of 7474000644 in words is "seven billion, four hundred seventy-four million, six hundred forty-four", and thus it is an aban number.