1535642068 has 12 divisors (see below), whose sum is σ = 2688530292. Its totient is φ = 767490560.

The previous prime is 1535642063. The next prime is 1535642093. The reversal of 1535642068 is 8602465351.

It can be written as a sum of positive squares in 2 ways, for example, as 721567044 + 814075024 = 26862^2 + 28532^2 .

It is a super-2 number, since 2×1535642068² = 4716393122022633248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1535642068.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1535642063) 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 3 ways as a sum of consecutive naturals, for example, 72013 + ... + 90868.

It is an arithmetic number, because the mean of its divisors is an integer number (224044191).

Almost surely, 2^1535642068 is an apocalyptic number.

It is an amenable number.

1535642068 is a deficient number, since it is larger than the sum of its proper divisors (1152888224).

1535642068 is a wasteful number, since it uses less digits than its factorization.

1535642068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165242 (or 165240 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 1535642068 is about 39187.2692082518. The cubic root of 1535642068 is about 1153.7100264930.

The spelling of 1535642068 in words is "one billion, five hundred thirty-five million, six hundred forty-two thousand, sixty-eight".