1551279168 has 224 divisors, whose sum is σ = 4934102400. Its totient is φ = 476264448.

The previous prime is 1551279161. The next prime is 1551279173. The reversal of 1551279168 is 8619721551.

1551279168 is a `hidden beast` number, since 1 + 5 + 512 + 79 + 1 + 68 = 666.

It is not an unprimeable number, because it can be changed into a prime (1551279161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1214146 + ... + 1215422.

Almost surely, 2^1551279168 is an apocalyptic number.

1551279168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1551279168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2467051200).

1551279168 is an abundant number, since it is smaller than the sum of its proper divisors (3382823232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1551279168 is a wasteful number, since it uses less digits than its factorization.

1551279168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354 (or 1338 counting only the distinct ones).

The product of its digits is 151200, while the sum is 45.

The square root of 1551279168 is about 39386.2814695675. The cubic root of 1551279168 is about 1157.6127997525.

The spelling of 1551279168 in words is "one billion, five hundred fifty-one million, two hundred seventy-nine thousand, one hundred sixty-eight".