5155616644 has 6 divisors (see below), whose sum is σ = 9022329134. Its totient is φ = 2577808320.

The previous prime is 5155616633. The next prime is 5155616657. The reversal of 5155616644 is 4466165515.

It can be written as a sum of positive squares in only one way, i.e., 3542630400 + 1612986244 = 59520^2 + 40162^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 5155616644.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644452077 + ... + 644452084.

Almost surely, 2^5155616644 is an apocalyptic number.

It is an amenable number.

5155616644 is a deficient number, since it is larger than the sum of its proper divisors (3866712490).

5155616644 is a wasteful number, since it uses less digits than its factorization.

5155616644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288904165 (or 1288904163 counting only the distinct ones).

The product of its digits is 432000, while the sum is 43.

The square root of 5155616644 is about 71802.6228211756. The cubic root of 5155616644 is about 1727.5350691233.

The spelling of 5155616644 in words is "five billion, one hundred fifty-five million, six hundred sixteen thousand, six hundred forty-four".