1551271164 has 12 divisors (see below), whose sum is σ = 3619632744. Its totient is φ = 517090384.

The previous prime is 1551271159. The next prime is 1551271193. The reversal of 1551271164 is 4611721551.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64636287 + ... + 64636310.

It is an arithmetic number, because the mean of its divisors is an integer number (301636062).

Almost surely, 2^1551271164 is an apocalyptic number.

It is an amenable number.

1551271164 is an abundant number, since it is smaller than the sum of its proper divisors (2068361580).

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

1551271164 is a wasteful number, since it uses less digits than its factorization.

1551271164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129272604 (or 129272602 counting only the distinct ones).

The product of its digits is 8400, while the sum is 33.

The square root of 1551271164 is about 39386.1798604536. The cubic root of 1551271164 is about 1157.6108088044.

The spelling of 1551271164 in words is "one billion, five hundred fifty-one million, two hundred seventy-one thousand, one hundred sixty-four".