263840451093 has 32 divisors (see below), whose sum is σ = 399724216320. Its totient is φ = 171921366000.

The previous prime is 263840451079. The next prime is 263840451131. The reversal of 263840451093 is 390154048362.

263840451093 is a `hidden beast` number, since 2 + 6 + 3 + 8 + 40 + 4 + 510 + 93 = 666.

It is not a de Polignac number, because 263840451093 - 2²⁴ = 263823673877 is a prime.

It is a super-2 number, since 2×263840451093² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263840451293) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 814596 + ... + 1091442.

It is an arithmetic number, because the mean of its divisors is an integer number (12491381760).

Almost surely, 2^263840451093 is an apocalyptic number.

It is an amenable number.

263840451093 is a deficient number, since it is larger than the sum of its proper divisors (135883765227).

263840451093 is a wasteful number, since it uses less digits than its factorization.

263840451093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277654 (or 277648 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 263840451093 in words is "two hundred sixty-three billion, eight hundred forty million, four hundred fifty-one thousand, ninety-three".