261262611033 has 8 divisors (see below), whose sum is σ = 348668862528. Its totient is φ = 174015716784.

The previous prime is 261262611023. The next prime is 261262611047. The reversal of 261262611033 is 330116262162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261262611033 - 2²⁴ = 261245833817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261262610985 and 261262611003.

It is not an unprimeable number, because it can be changed into a prime (261262611023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39835485 + ... + 39842042.

It is an arithmetic number, because the mean of its divisors is an integer number (43583607816).

Almost surely, 2^261262611033 is an apocalyptic number.

It is an amenable number.

261262611033 is a deficient number, since it is larger than the sum of its proper divisors (87406251495).

261262611033 is a wasteful number, since it uses less digits than its factorization.

261262611033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79678623.

The product of its (nonzero) digits is 15552, while the sum is 33.

Adding to 261262611033 its reverse (330116262162), we get a palindrome (591378873195).

It can be divided in two parts, 2612 and 62611033, that added together give a triangular number (62613645 = T₁₁₁₉₀).

The spelling of 261262611033 in words is "two hundred sixty-one billion, two hundred sixty-two million, six hundred eleven thousand, thirty-three".