2612129881 has 3 divisors (see below), whose sum is σ = 2612180991. Its totient is φ = 2612078772.

The previous prime is 2612129879. The next prime is 2612129887. The reversal of 2612129881 is 1889212162.

The square root of 2612129881 is 51109.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 2514119881 + 98010000 = 50141^2 + 9900^2 .

It is not a de Polignac number, because 2612129881 - 2¹ = 2612129879 is a prime.

It is a super-2 number, since 2×2612129881² = 13646445030426148322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2612129887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 25555 + ... + 76663.

It is an arithmetic number, because the mean of its divisors is an integer number (870726997).

Almost surely, 2^2612129881 is an apocalyptic number.

2612129881 is the 51109-th square number.

2612129881 is the 25555-th centered octagonal number.

It is an amenable number.

2612129881 is a deficient number, since it is larger than the sum of its proper divisors (51110).

2612129881 is an frugal number, since it uses more digits than its factorization.

2612129881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102218 (or 51109 counting only the distinct ones).

The product of its digits is 27648, while the sum is 40.

The cubic root of 2612129881 is about 1377.2039376331.

The spelling of 2612129881 in words is "two billion, six hundred twelve million, one hundred twenty-nine thousand, eight hundred eighty-one".