263421078975 has 18 divisors (see below), whose sum is σ = 471816421856. Its totient is φ = 140491242000.

The previous prime is 263421078887. The next prime is 263421079003. The reversal of 263421078975 is 579870124362.

It is a happy number.

263421078975 is a `hidden beast` number, since 2 + 63 + 421 + 0 + 78 + 97 + 5 = 666.

It is not a de Polignac number, because 263421078975 - 2⁹ = 263421078463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 585379951 + ... + 585380400.

It is a 1-persistent number, because it is pandigital, but 2⋅263421078975 = 526842157950 is not.

Almost surely, 2^263421078975 is an apocalyptic number.

263421078975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

263421078975 is a deficient number, since it is larger than the sum of its proper divisors (208395342881).

263421078975 is a wasteful number, since it uses less digits than its factorization.

263421078975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170760367 (or 1170760359 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 263421078975 in words is "two hundred sixty-three billion, four hundred twenty-one million, seventy-eight thousand, nine hundred seventy-five".