2601988835161 has 4 divisors (see below), whose sum is σ = 2665451977524. Its totient is φ = 2538525692800.

The previous prime is 2601988835101. The next prime is 2601988835167. The reversal of 2601988835161 is 1615388891062.

It is a happy number.

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 1005698094025 + 1596290741136 = 1002845^2 + 1263444^2 .

It is not a de Polignac number, because 2601988835161 - 2²⁹ = 2601451964249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2601988835096 and 2601988835105.

It is not an unprimeable number, because it can be changed into a prime (2601988835167) 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, 31731571120 + ... + 31731571201.

It is an arithmetic number, because the mean of its divisors is an integer number (666362994381).

Almost surely, 2^{2601988835161} is an apocalyptic number.

It is an amenable number.

2601988835161 is a deficient number, since it is larger than the sum of its proper divisors (63463142363).

2601988835161 is an equidigital number, since it uses as much as digits as its factorization.

2601988835161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63463142362.

The product of its (nonzero) digits is 4976640, while the sum is 58.

The spelling of 2601988835161 in words is "two trillion, six hundred one billion, nine hundred eighty-eight million, eight hundred thirty-five thousand, one hundred sixty-one".