1568129136 has 40 divisors (see below), whose sum is σ = 4629715584. Its totient is φ = 448036800.

The previous prime is 1568129119. The next prime is 1568129149. The reversal of 1568129136 is 6319218651.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2333190 + ... + 2333861.

Almost surely, 2^1568129136 is an apocalyptic number.

1568129136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1568129136 is an abundant number, since it is smaller than the sum of its proper divisors (3061586448).

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

1568129136 is a wasteful number, since it uses less digits than its factorization.

1568129136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4667069 (or 4667063 counting only the distinct ones).

The product of its digits is 77760, while the sum is 42.

The square root of 1568129136 is about 39599.6103011128. The cubic root of 1568129136 is about 1161.7890388370.

The spelling of 1568129136 in words is "one billion, five hundred sixty-eight million, one hundred twenty-nine thousand, one hundred thirty-six".