3649009691 has 8 divisors (see below), whose sum is σ = 3729560400. Its totient is φ = 3569127840.

The previous prime is 3649009687. The next prime is 3649009699. The reversal of 3649009691 is 1969009463.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3649009691 - 2² = 3649009687 is a prime.

It is a super-4 number, since 4×3649009691⁴ (a number of 39 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3649009699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156176 + ... + 178013.

It is an arithmetic number, because the mean of its divisors is an integer number (466195050).

Almost surely, 2^3649009691 is an apocalyptic number.

3649009691 is a deficient number, since it is larger than the sum of its proper divisors (80550709).

3649009691 is a wasteful number, since it uses less digits than its factorization.

3649009691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334429.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 3649009691 is about 60407.0334563782. The cubic root of 3649009691 is about 1539.5424641521.

The spelling of 3649009691 in words is "three billion, six hundred forty-nine million, nine thousand, six hundred ninety-one".