28621148245 has 16 divisors (see below), whose sum is σ = 35038924272. Its totient is φ = 22435678720.

The previous prime is 28621148243. The next prime is 28621148249. The reversal of 28621148245 is 54284112682.

It can be written as a sum of positive squares in 8 ways, for example, as 97653924 + 28523494321 = 9882^2 + 168889^2 .

It is not a de Polignac number, because 28621148245 - 2¹ = 28621148243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28621148243) 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, 134985 + ... + 274705.

It is an arithmetic number, because the mean of its divisors is an integer number (2189932767).

Almost surely, 2^28621148245 is an apocalyptic number.

It is an amenable number.

28621148245 is a deficient number, since it is larger than the sum of its proper divisors (6417776027).

28621148245 is a wasteful number, since it uses less digits than its factorization.

28621148245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140552.

The product of its digits is 245760, while the sum is 43.

The spelling of 28621148245 in words is "twenty-eight billion, six hundred twenty-one million, one hundred forty-eight thousand, two hundred forty-five".