10643312671555 has 4 divisors (see below), whose sum is σ = 12771975205872. Its totient is φ = 8514650137240.

The previous prime is 10643312671477. The next prime is 10643312671567. The reversal of 10643312671555 is 55517621334601.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 10643312671555 - 2¹³ = 10643312663363 is a prime.

It is a super-2 number, since 2×10643312671555² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10643312671499 and 10643312671508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064331267151 + ... + 1064331267160.

It is an arithmetic number, because the mean of its divisors is an integer number (3192993801468).

Almost surely, 2^{10643312671555} is an apocalyptic number.

10643312671555 is a deficient number, since it is larger than the sum of its proper divisors (2128662534317).

10643312671555 is an equidigital number, since it uses as much as digits as its factorization.

10643312671555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128662534316.

The product of its (nonzero) digits is 2268000, while the sum is 49.

The spelling of 10643312671555 in words is "ten trillion, six hundred forty-three billion, three hundred twelve million, six hundred seventy-one thousand, five hundred fifty-five".