263661145404136 has 32 divisors (see below), whose sum is σ = 494473560105600. Its totient is φ = 131801532543360.

The previous prime is 263661145404103. The next prime is 263661145404149. The reversal of 263661145404136 is 631404541166362.

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, 699380251 + ... + 699757141.

It is an arithmetic number, because the mean of its divisors is an integer number (15452298753300).

Almost surely, 2^{263661145404136} is an apocalyptic number.

It is an amenable number.

263661145404136 is a deficient number, since it is larger than the sum of its proper divisors (230812414701464).

263661145404136 is a wasteful number, since it uses less digits than its factorization.

263661145404136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395929 (or 395925 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 52.

The spelling of 263661145404136 in words is "two hundred sixty-three trillion, six hundred sixty-one billion, one hundred forty-five million, four hundred four thousand, one hundred thirty-six".