1263065106551 has 4 divisors (see below), whose sum is σ = 1263080844600. Its totient is φ = 1263049368504.

The previous prime is 1263065106503. The next prime is 1263065106593. The reversal of 1263065106551 is 1556015603621.

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

It is a cyclic number.

It is not a de Polignac number, because 1263065106551 - 2⁶ = 1263065106487 is a prime.

It is a super-3 number, since 3×1263065106551³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1263065106499 and 1263065106508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263065108551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7748021 + ... + 7909358.

It is an arithmetic number, because the mean of its divisors is an integer number (315770211150).

Almost surely, 2^{1263065106551} is an apocalyptic number.

1263065106551 is a deficient number, since it is larger than the sum of its proper divisors (15738049).

1263065106551 is an equidigital number, since it uses as much as digits as its factorization.

1263065106551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15738048.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 1263065106551 in words is "one trillion, two hundred sixty-three billion, sixty-five million, one hundred six thousand, five hundred fifty-one".