261534452164107 has 8 divisors (see below), whose sum is σ = 348746356929600. Its totient is φ = 174339424420680.

The previous prime is 261534452164103. The next prime is 261534452164121. The reversal of 261534452164107 is 701461254435162.

It is a happy number.

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

It is not a de Polignac number, because 261534452164107 - 2² = 261534452164103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261534452164107.

It is not an unprimeable number, because it can be changed into a prime (261534452164103) 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, 4219219357 + ... + 4219281342.

It is an arithmetic number, because the mean of its divisors is an integer number (43593294616200).

Almost surely, 2^{261534452164107} is an apocalyptic number.

261534452164107 is a deficient number, since it is larger than the sum of its proper divisors (87211904765493).

261534452164107 is a wasteful number, since it uses less digits than its factorization.

261534452164107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8438511033.

The product of its (nonzero) digits is 4838400, while the sum is 51.

The spelling of 261534452164107 in words is "two hundred sixty-one trillion, five hundred thirty-four billion, four hundred fifty-two million, one hundred sixty-four thousand, one hundred seven".