3688526421 has 6 divisors (see below), whose sum is σ = 5327871510. Its totient is φ = 2459017608.

The previous prime is 3688526417. The next prime is 3688526437. The reversal of 3688526421 is 1246258863.

3688526421 is a `hidden beast` number, since 3 + 6 + 88 + 526 + 42 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2911789521 + 776736900 = 53961^2 + 27870^2 .

It is not a de Polignac number, because 3688526421 - 2² = 3688526417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3688526021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204918126 + ... + 204918143.

It is an arithmetic number, because the mean of its divisors is an integer number (887978585).

Almost surely, 2^3688526421 is an apocalyptic number.

It is an amenable number.

3688526421 is a deficient number, since it is larger than the sum of its proper divisors (1639345089).

3688526421 is a wasteful number, since it uses less digits than its factorization.

3688526421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409836275 (or 409836272 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 3688526421 is about 60733.2398361886. The cubic root of 3688526421 is about 1545.0799832913.

The spelling of 3688526421 in words is "three billion, six hundred eighty-eight million, five hundred twenty-six thousand, four hundred twenty-one".