3651946359 has 4 divisors (see below), whose sum is σ = 4869261816. Its totient is φ = 2434630904.

The previous prime is 3651946339. The next prime is 3651946367. The reversal of 3651946359 is 9536491563.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9536491563 = 3 ⋅3178830521.

It is a cyclic number.

It is not a de Polignac number, because 3651946359 - 2²¹ = 3649849207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3651946339) 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 3 ways as a sum of consecutive naturals, for example, 608657724 + ... + 608657729.

It is an arithmetic number, because the mean of its divisors is an integer number (1217315454).

Almost surely, 2^3651946359 is an apocalyptic number.

3651946359 is a deficient number, since it is larger than the sum of its proper divisors (1217315457).

3651946359 is a wasteful number, since it uses less digits than its factorization.

3651946359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217315456.

The product of its digits is 2624400, while the sum is 51.

The square root of 3651946359 is about 60431.3359028245. The cubic root of 3651946359 is about 1539.9553535997.

The spelling of 3651946359 in words is "three billion, six hundred fifty-one million, nine hundred forty-six thousand, three hundred fifty-nine".