263708428319 has 16 divisors (see below), whose sum is σ = 307447410240. Its totient is φ = 221496587520.

The previous prime is 263708428307. The next prime is 263708428339. The reversal of 263708428319 is 913824807362.

It is a cyclic number.

It is not a de Polignac number, because 263708428319 - 2²⁴ = 263691651103 is a prime.

It is a super-2 number, since 2×263708428319² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263708428339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139172 + ... + 739449.

It is an arithmetic number, because the mean of its divisors is an integer number (19215463140).

Almost surely, 2^263708428319 is an apocalyptic number.

263708428319 is a deficient number, since it is larger than the sum of its proper divisors (43738981921).

263708428319 is an equidigital number, since it uses as much as digits as its factorization.

263708428319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879490.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 263708428319 in words is "two hundred sixty-three billion, seven hundred eight million, four hundred twenty-eight thousand, three hundred nineteen".