65837412261 has 12 divisors (see below), whose sum is σ = 95792635692. Its totient is φ = 43571230656.

The previous prime is 65837412247. The next prime is 65837412299. The reversal of 65837412261 is 16221473856.

65837412261 is a `hidden beast` number, since 6 + 5 + 8 + 374 + 12 + 261 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17610617025 + 48226795236 = 132705^2 + 219606^2 .

It is not a de Polignac number, because 65837412261 - 2¹³ = 65837404069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65837412211) 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, 26696826 + ... + 26699291.

It is an arithmetic number, because the mean of its divisors is an integer number (7982719641).

Almost surely, 2^65837412261 is an apocalyptic number.

It is an amenable number.

65837412261 is a deficient number, since it is larger than the sum of its proper divisors (29955223431).

65837412261 is a wasteful number, since it uses less digits than its factorization.

65837412261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53396260 (or 53396257 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 65837412261 in words is "sixty-five billion, eight hundred thirty-seven million, four hundred twelve thousand, two hundred sixty-one".