28437408862461 has 12 divisors (see below), whose sum is σ = 41076516740220. Its totient is φ = 18958152808320.

The previous prime is 28437408862459. The next prime is 28437408862481. The reversal of 28437408862461 is 16426880473482.

It is a happy number.

28437408862461 is a `hidden beast` number, since 2 + 8 + 4 + 37 + 4 + 0 + 88 + 62 + 461 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9391987683225 + 19045421179236 = 3064635^2 + 4364106^2 .

It is not a de Polignac number, because 28437408862461 - 2¹ = 28437408862459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28437408862451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8464650 + ... + 11336891.

It is an arithmetic number, because the mean of its divisors is an integer number (3423043061685).

Almost surely, 2^{28437408862461} is an apocalyptic number.

It is an amenable number.

28437408862461 is a deficient number, since it is larger than the sum of its proper divisors (12639107877759).

28437408862461 is a wasteful number, since it uses less digits than its factorization.

28437408862461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19961116 (or 19961113 counting only the distinct ones).

The product of its (nonzero) digits is 99090432, while the sum is 63.

The spelling of 28437408862461 in words is "twenty-eight trillion, four hundred thirty-seven billion, four hundred eight million, eight hundred sixty-two thousand, four hundred sixty-one".