2135464625661 has 16 divisors (see below), whose sum is σ = 2925069485184. Its totient is φ = 1384773257664.

The previous prime is 2135464625611. The next prime is 2135464625681. The reversal of 2135464625661 is 1665264645312.

It is not a de Polignac number, because 2135464625661 - 2¹⁰ = 2135464624637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135464625611) 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, 2335810 + ... + 3118803.

It is an arithmetic number, because the mean of its divisors is an integer number (182816842824).

Almost surely, 2^{2135464625661} is an apocalyptic number.

It is an amenable number.

2135464625661 is a deficient number, since it is larger than the sum of its proper divisors (789604859523).

2135464625661 is a wasteful number, since it uses less digits than its factorization.

2135464625661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5458180.

The product of its digits is 6220800, while the sum is 51.

The spelling of 2135464625661 in words is "two trillion, one hundred thirty-five billion, four hundred sixty-four million, six hundred twenty-five thousand, six hundred sixty-one".