172755783261 has 16 divisors (see below), whose sum is σ = 261379910400. Its totient is φ = 112720084704.

The previous prime is 172755783259. The next prime is 172755783271. The reversal of 172755783261 is 162387557271.

172755783261 is a `hidden beast` number, since 1 + 7 + 2 + 7 + 5 + 578 + 3 + 2 + 61 = 666.

It is not a de Polignac number, because 172755783261 - 2¹ = 172755783259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172755783198 and 172755783207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172755783271) 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, 68066416 + ... + 68068953.

It is an arithmetic number, because the mean of its divisors is an integer number (16336244400).

Almost surely, 2^172755783261 is an apocalyptic number.

It is an amenable number.

172755783261 is a deficient number, since it is larger than the sum of its proper divisors (88624127139).

172755783261 is a wasteful number, since it uses less digits than its factorization.

172755783261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136135425 (or 136135419 counting only the distinct ones).

The product of its digits is 4939200, while the sum is 54.

The spelling of 172755783261 in words is "one hundred seventy-two billion, seven hundred fifty-five million, seven hundred eighty-three thousand, two hundred sixty-one".