87073317261 has 12 divisors (see below), whose sum is σ = 143740079392. Its totient is φ = 49756181256.

The previous prime is 87073317259. The next prime is 87073317323. The reversal of 87073317261 is 16271337078.

87073317261 is a `hidden beast` number, since 8 + 7 + 0 + 73 + 317 + 261 = 666.

It is not a de Polignac number, because 87073317261 - 2¹ = 87073317259 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87073317251) 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, 691058011 + ... + 691058136.

Almost surely, 2^87073317261 is an apocalyptic number.

It is an amenable number.

87073317261 is a deficient number, since it is larger than the sum of its proper divisors (56666762131).

87073317261 is a wasteful number, since it uses less digits than its factorization.

87073317261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382116160 (or 1382116157 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The spelling of 87073317261 in words is "eighty-seven billion, seventy-three million, three hundred seventeen thousand, two hundred sixty-one".