6154320644 has 24 divisors (see below), whose sum is σ = 10937166240. Its totient is φ = 3029469696.

The previous prime is 6154320631. The next prime is 6154320701. The reversal of 6154320644 is 4460234516.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537572 + ... + 548900.

It is an arithmetic number, because the mean of its divisors is an integer number (455715260).

Almost surely, 2^6154320644 is an apocalyptic number.

It is an amenable number.

6154320644 is a deficient number, since it is larger than the sum of its proper divisors (4782845596).

6154320644 is a wasteful number, since it uses less digits than its factorization.

6154320644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13427 (or 13425 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 6154320644 is about 78449.4782901709. The cubic root of 6154320644 is about 1832.5677515591.

The spelling of 6154320644 in words is "six billion, one hundred fifty-four million, three hundred twenty thousand, six hundred forty-four".