2651861341 has 4 divisors (see below), whose sum is σ = 2652149052. Its totient is φ = 2651573632.

The previous prime is 2651861339. The next prime is 2651861347. The reversal of 2651861341 is 1431681562.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1431681562 = 2 ⋅715840781.

It can be written as a sum of positive squares in 2 ways, for example, as 369792900 + 2282068441 = 19230^2 + 47771^2 .

It is a cyclic number.

It is not a de Polignac number, because 2651861341 - 2¹ = 2651861339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2651861341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2651861347) 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, 129556 + ... + 148621.

It is an arithmetic number, because the mean of its divisors is an integer number (663037263).

Almost surely, 2^2651861341 is an apocalyptic number.

It is an amenable number.

2651861341 is a deficient number, since it is larger than the sum of its proper divisors (287711).

2651861341 is an equidigital number, since it uses as much as digits as its factorization.

2651861341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287710.

The product of its digits is 34560, while the sum is 37.

The square root of 2651861341 is about 51496.2264734029. The cubic root of 2651861341 is about 1384.1514246553.

The spelling of 2651861341 in words is "two billion, six hundred fifty-one million, eight hundred sixty-one thousand, three hundred forty-one".