261028100134 has 16 divisors (see below), whose sum is σ = 393039888768. Its totient is φ = 130015737792.

The previous prime is 261028100059. The next prime is 261028100143. The reversal of 261028100134 is 431001820162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327339 + ... + 793225.

It is an arithmetic number, because the mean of its divisors is an integer number (24564993048).

Almost surely, 2^261028100134 is an apocalyptic number.

261028100134 is a deficient number, since it is larger than the sum of its proper divisors (132011788634).

261028100134 is a wasteful number, since it uses less digits than its factorization.

261028100134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466959.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 261028100134 its reverse (431001820162), we get a palindrome (692029920296).

The spelling of 261028100134 in words is "two hundred sixty-one billion, twenty-eight million, one hundred thousand, one hundred thirty-four".