1551170711551 has 4 divisors (see below), whose sum is σ = 1551173353704. Its totient is φ = 1551168069400.

The previous prime is 1551170711537. The next prime is 1551170711659.

1551170711551 is nontrivially palindromic in base 10.

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 1551170711551 - 2⁹ = 1551170711039 is a prime.

It is a super-2 number, since 2×1551170711551² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551173711551) 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, 265 + ... + 1761346.

It is an arithmetic number, because the mean of its divisors is an integer number (387793338426).

Almost surely, 2^{1551170711551} is an apocalyptic number.

1551170711551 is a deficient number, since it is larger than the sum of its proper divisors (2642153).

1551170711551 is an equidigital number, since it uses as much as digits as its factorization.

1551170711551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642152.

The product of its (nonzero) digits is 30625, while the sum is 40.

The spelling of 1551170711551 in words is "one trillion, five hundred fifty-one billion, one hundred seventy million, seven hundred eleven thousand, five hundred fifty-one".