2135581677 has 6 divisors (see below), whose sum is σ = 3084729102. Its totient is φ = 1423721112.

The previous prime is 2135581601. The next prime is 2135581681. The reversal of 2135581677 is 7761855312.

It is a happy number.

2135581677 is a `hidden beast` number, since 2 + 1 + 3 + 5 + 581 + 67 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1410302916 + 725278761 = 37554^2 + 26931^2 .

It is not a de Polignac number, because 2135581677 - 2⁸ = 2135581421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135581277) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118643418 + ... + 118643435.

It is an arithmetic number, because the mean of its divisors is an integer number (514121517).

Almost surely, 2^2135581677 is an apocalyptic number.

It is an amenable number.

2135581677 is a deficient number, since it is larger than the sum of its proper divisors (949147425).

2135581677 is a wasteful number, since it uses less digits than its factorization.

2135581677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237286859 (or 237286856 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 2135581677 is about 46212.3541598997. The cubic root of 2135581677 is about 1287.7712606817.

The spelling of 2135581677 in words is "two billion, one hundred thirty-five million, five hundred eighty-one thousand, six hundred seventy-seven".