1551716126651 has 16 divisors (see below), whose sum is σ = 1601938658880. Its totient is φ = 1502337408000.

The previous prime is 1551716126617. The next prime is 1551716126657. The reversal of 1551716126651 is 1566216171551.

It is a cyclic number.

It is not a de Polignac number, because 1551716126651 - 2¹⁸ = 1551715864507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1551716126596 and 1551716126605.

It is not an unprimeable number, because it can be changed into a prime (1551716126657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2045651 + ... + 2699651.

It is an arithmetic number, because the mean of its divisors is an integer number (100121166180).

Almost surely, 2^{1551716126651} is an apocalyptic number.

1551716126651 is a deficient number, since it is larger than the sum of its proper divisors (50222532229).

1551716126651 is an equidigital number, since it uses as much as digits as its factorization.

1551716126651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654646.

The product of its digits is 378000, while the sum is 47.

The spelling of 1551716126651 in words is "one trillion, five hundred fifty-one billion, seven hundred sixteen million, one hundred twenty-six thousand, six hundred fifty-one".