3506421636 has 60 divisors (see below), whose sum is σ = 9282577920. Its totient is φ = 1154003760.

The previous prime is 3506421631. The next prime is 3506421637. The reversal of 3506421636 is 6361246053.

3506421636 is a `hidden beast` number, since 3 + 5 + 0 + 642 + 1 + 6 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 3506421636.

It is not an unprimeable number, because it can be changed into a prime (3506421631) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 42900 + ... + 94091.

It is an arithmetic number, because the mean of its divisors is an integer number (154709632).

Almost surely, 2^3506421636 is an apocalyptic number.

3506421636 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3506421636 is an abundant number, since it is smaller than the sum of its proper divisors (5776156284).

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

3506421636 is a wasteful number, since it uses less digits than its factorization.

3506421636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137086 (or 137075 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 3506421636 is about 59215.0456894192. The cubic root of 3506421636 is about 1519.2224838133. Note that the first 3 decimals are identical.

Adding to 3506421636 its reverse (6361246053), we get a palindrome (9867667689).

The spelling of 3506421636 in words is "three billion, five hundred six million, four hundred twenty-one thousand, six hundred thirty-six".