261040384594 has 16 divisors (see below), whose sum is σ = 427171597920. Its totient is φ = 118650663360.

The previous prime is 261040384543. The next prime is 261040384621. The reversal of 261040384594 is 495483040162.

It is a super-4 number, since 4×261040384594⁴ (a number of 47 digits) contains 4444 as substring.

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, 511057 + ... + 885019.

It is an arithmetic number, because the mean of its divisors is an integer number (26698224870).

Almost surely, 2^261040384594 is an apocalyptic number.

261040384594 is a deficient number, since it is larger than the sum of its proper divisors (166131213326).

261040384594 is a wasteful number, since it uses less digits than its factorization.

261040384594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405705.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 261040384594 in words is "two hundred sixty-one billion, forty million, three hundred eighty-four thousand, five hundred ninety-four".