263155505012643 has 8 divisors (see below), whose sum is σ = 371513654135568. Its totient is φ = 165117179615744.

The previous prime is 263155505012641. The next prime is 263155505012657. The reversal of 263155505012643 is 346210505551362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 263155505012643 - 2¹ = 263155505012641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 263155505012592 and 263155505012601.

It is not an unprimeable number, because it can be changed into a prime (263155505012641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2579955931446 + ... + 2579955931547.

It is an arithmetic number, because the mean of its divisors is an integer number (46439206766946).

Almost surely, 2^{263155505012643} is an apocalyptic number.

263155505012643 is a deficient number, since it is larger than the sum of its proper divisors (108358149122925).

263155505012643 is a wasteful number, since it uses less digits than its factorization.

263155505012643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5159911863013.

The product of its (nonzero) digits is 3240000, while the sum is 48.

The spelling of 263155505012643 in words is "two hundred sixty-three trillion, one hundred fifty-five billion, five hundred five million, twelve thousand, six hundred forty-three".