1551515616351 has 12 divisors (see below), whose sum is σ = 2242814053480. Its totient is φ = 1033542540720.

The previous prime is 1551515616337. The next prime is 1551515616397. The reversal of 1551515616351 is 1536165151551.

1551515616351 is a `hidden beast` number, since 1 + 5 + 5 + 1 + 5 + 1 + 5 + 6 + 1 + 635 + 1 = 666.

It is not a de Polignac number, because 1551515616351 - 2¹¹ = 1551515614303 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1551515616297 and 1551515616306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551515616151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66754696 + ... + 66777933.

Almost surely, 2^{1551515616351} is an apocalyptic number.

1551515616351 is a deficient number, since it is larger than the sum of its proper divisors (691298437129).

1551515616351 is a wasteful number, since it uses less digits than its factorization.

1551515616351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133533926 (or 133533923 counting only the distinct ones).

The product of its digits is 337500, while the sum is 45.

The spelling of 1551515616351 in words is "one trillion, five hundred fifty-one billion, five hundred fifteen million, six hundred sixteen thousand, three hundred fifty-one".