3646431644 has 36 divisors (see below), whose sum is σ = 6540406824. Its totient is φ = 1778824416.

The previous prime is 3646431599. The next prime is 3646431653. The reversal of 3646431644 is 4461346463.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4974302 + ... + 4975034.

Almost surely, 2^3646431644 is an apocalyptic number.

It is an amenable number.

3646431644 is a deficient number, since it is larger than the sum of its proper divisors (2893975180).

3646431644 is a wasteful number, since it uses less digits than its factorization.

3646431644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394 (or 1345 counting only the distinct ones).

The product of its digits is 497664, while the sum is 41.

The square root of 3646431644 is about 60385.6907222233. The cubic root of 3646431644 is about 1539.1798134382.

The spelling of 3646431644 in words is "three billion, six hundred forty-six million, four hundred thirty-one thousand, six hundred forty-four".