83537081261 has 8 divisors (see below), whose sum is σ = 88753284120. Its totient is φ = 78476586048.

The previous prime is 83537081209. The next prime is 83537081273. The reversal of 83537081261 is 16218073538.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22968918025 + 60568163236 = 151555^2 + 246106^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83537081261 - 2¹⁸ = 83536819117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83534081261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38925806 + ... + 38927951.

It is an arithmetic number, because the mean of its divisors is an integer number (11094160515).

Almost surely, 2^83537081261 is an apocalyptic number.

It is an amenable number.

83537081261 is a deficient number, since it is larger than the sum of its proper divisors (5216202859).

83537081261 is a wasteful number, since it uses less digits than its factorization.

83537081261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77853823.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 83537081261 in words is "eighty-three billion, five hundred thirty-seven million, eighty-one thousand, two hundred sixty-one".