261834969378 has 32 divisors (see below), whose sum is σ = 566129672640. Its totient is φ = 80450003520.

The previous prime is 261834969349. The next prime is 261834969467. The reversal of 261834969378 is 873969438162.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31033593 + ... + 31042028.

It is an arithmetic number, because the mean of its divisors is an integer number (17691552270).

Almost surely, 2^261834969378 is an apocalyptic number.

261834969378 is an abundant number, since it is smaller than the sum of its proper divisors (304294703262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261834969378 is a wasteful number, since it uses less digits than its factorization.

261834969378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62075682.

The product of its digits is 94058496, while the sum is 66.

The spelling of 261834969378 in words is "two hundred sixty-one billion, eight hundred thirty-four million, nine hundred sixty-nine thousand, three hundred seventy-eight".