263416430655 has 96 divisors (see below), whose sum is σ = 540010373760. Its totient is φ = 116223206400.

The previous prime is 263416430633. The next prime is 263416430657. The reversal of 263416430655 is 556034614362.

263416430655 is a `hidden beast` number, since 2 + 634 + 1 + 6 + 4 + 3 + 0 + 6 + 5 + 5 = 666.

It is not a de Polignac number, because 263416430655 - 2¹⁵ = 263416397887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 263416430655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263416430657) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 46594809 + ... + 46600461.

It is an arithmetic number, because the mean of its divisors is an integer number (5625108060).

Almost surely, 2^263416430655 is an apocalyptic number.

263416430655 is an abundant number, since it is smaller than the sum of its proper divisors (276593943105).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

263416430655 is a wasteful number, since it uses less digits than its factorization.

263416430655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10801 (or 10798 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 45.

The spelling of 263416430655 in words is "two hundred sixty-three billion, four hundred sixteen million, four hundred thirty thousand, six hundred fifty-five".