261544420010474 has 16 divisors (see below), whose sum is σ = 393121851838848. Its totient is φ = 130504077882192.

The previous prime is 261544420010459. The next prime is 261544420010501. The reversal of 261544420010474 is 474010024445162.

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, 66885737 + ... + 70687980.

It is an arithmetic number, because the mean of its divisors is an integer number (24570115739928).

Almost surely, 2^{261544420010474} is an apocalyptic number.

261544420010474 is a deficient number, since it is larger than the sum of its proper divisors (131577431828374).

261544420010474 is a wasteful number, since it uses less digits than its factorization.

261544420010474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137575669.

The product of its (nonzero) digits is 860160, while the sum is 44.

The spelling of 261544420010474 in words is "two hundred sixty-one trillion, five hundred forty-four billion, four hundred twenty million, ten thousand, four hundred seventy-four".