72055855261 has 16 divisors (see below), whose sum is σ = 77811173440. Its totient is φ = 66331146240.

The previous prime is 72055855259. The next prime is 72055855273. The reversal of 72055855261 is 16255855027.

It is a cyclic number.

It is not a de Polignac number, because 72055855261 - 2¹ = 72055855259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72055858261) 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, 8554510 + ... + 8562928.

It is an arithmetic number, because the mean of its divisors is an integer number (4863198340).

Almost surely, 2^72055855261 is an apocalyptic number.

It is an amenable number.

72055855261 is a deficient number, since it is larger than the sum of its proper divisors (5755318179).

72055855261 is a wasteful number, since it uses less digits than its factorization.

72055855261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10156.

The product of its (nonzero) digits is 840000, while the sum is 46.

The spelling of 72055855261 in words is "seventy-two billion, fifty-five million, eight hundred fifty-five thousand, two hundred sixty-one".