1506056556551 has 4 divisors (see below), whose sum is σ = 1506763959600. Its totient is φ = 1505349153504.

The previous prime is 1506056556523. The next prime is 1506056556593. The reversal of 1506056556551 is 1556556506051.

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 1506056556551 - 2²⁶ = 1505989447687 is a prime.

It is a super-2 number, since 2×1506056556551² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1506056556551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1506056576551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353698331 + ... + 353702588.

It is an arithmetic number, because the mean of its divisors is an integer number (376690989900).

Almost surely, 2^{1506056556551} is an apocalyptic number.

1506056556551 is a deficient number, since it is larger than the sum of its proper divisors (707403049).

1506056556551 is an equidigital number, since it uses as much as digits as its factorization.

1506056556551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707403048.

The product of its (nonzero) digits is 3375000, while the sum is 50.

The spelling of 1506056556551 in words is "one trillion, five hundred six billion, fifty-six million, five hundred fifty-six thousand, five hundred fifty-one".