261515264127347 has 4 divisors (see below), whose sum is σ = 267079418683296. Its totient is φ = 255951109571400.

The previous prime is 261515264127343. The next prime is 261515264127367. The reversal of 261515264127347 is 743721462515162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261515264127347 - 2² = 261515264127343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261515264127292 and 261515264127301.

It is not an unprimeable number, because it can be changed into a prime (261515264127343) 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, 2782077277904 + ... + 2782077277997.

It is an arithmetic number, because the mean of its divisors is an integer number (66769854670824).

Almost surely, 2^{261515264127347} is an apocalyptic number.

261515264127347 is a deficient number, since it is larger than the sum of its proper divisors (5564154555949).

261515264127347 is an equidigital number, since it uses as much as digits as its factorization.

261515264127347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5564154555948.

The product of its digits is 16934400, while the sum is 56.

The spelling of 261515264127347 in words is "two hundred sixty-one trillion, five hundred fifteen billion, two hundred sixty-four million, one hundred twenty-seven thousand, three hundred forty-seven".