28655321513 has 16 divisors (see below), whose sum is σ = 36221283840. Its totient is φ = 22059573696.

The previous prime is 28655321441. The next prime is 28655321537. The reversal of 28655321513 is 31512355682.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28655321513 - 2¹⁰ = 28655320489 is a prime.

It is a super-3 number, since 3×28655321513³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (28655321543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4251953 + ... + 4258686.

It is an arithmetic number, because the mean of its divisors is an integer number (2263830240).

Almost surely, 2^28655321513 is an apocalyptic number.

It is an amenable number.

28655321513 is a deficient number, since it is larger than the sum of its proper divisors (7565962327).

28655321513 is a wasteful number, since it uses less digits than its factorization.

28655321513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8510696.

The product of its digits is 216000, while the sum is 41.

The spelling of 28655321513 in words is "twenty-eight billion, six hundred fifty-five million, three hundred twenty-one thousand, five hundred thirteen".