201577956116473 has 4 divisors (see below), whose sum is σ = 202015218494628. Its totient is φ = 201140693738320.

The previous prime is 201577956116441. The next prime is 201577956116503. The reversal of 201577956116473 is 374611659775102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19742763818089 + 181835192298384 = 4443283^2 + 13484628^2 .

It is a cyclic number.

It is not a de Polignac number, because 201577956116473 - 2⁵ = 201577956116441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201577956116413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218631188386 + ... + 218631189307.

It is an arithmetic number, because the mean of its divisors is an integer number (50503804623657).

Almost surely, 2^{201577956116473} is an apocalyptic number.

It is an amenable number.

201577956116473 is a deficient number, since it is larger than the sum of its proper divisors (437262378155).

201577956116473 is an equidigital number, since it uses as much as digits as its factorization.

201577956116473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437262378154.

The product of its (nonzero) digits is 66679200, while the sum is 64.

The spelling of 201577956116473 in words is "two hundred one trillion, five hundred seventy-seven billion, nine hundred fifty-six million, one hundred sixteen thousand, four hundred seventy-three".