7728216053 has 4 divisors (see below), whose sum is σ = 7730323788. Its totient is φ = 7726108320.

The previous prime is 7728215977. The next prime is 7728216113. The reversal of 7728216053 is 3506128277.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 167391844 + 7560824209 = 12938^2 + 86953^2 .

It is a cyclic number.

It is not a de Polignac number, because 7728216053 - 2⁸ = 7728215797 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 7728216053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7728216553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1048358 + ... + 1055703.

It is an arithmetic number, because the mean of its divisors is an integer number (1932580947).

Almost surely, 2^7728216053 is an apocalyptic number.

It is an amenable number.

7728216053 is a deficient number, since it is larger than the sum of its proper divisors (2107735).

7728216053 is a wasteful number, since it uses less digits than its factorization.

7728216053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107734.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 7728216053 is about 87910.2727387420. The cubic root of 7728216053 is about 1977.0899035640.

The spelling of 7728216053 in words is "seven billion, seven hundred twenty-eight million, two hundred sixteen thousand, fifty-three".