1649723356 has 6 divisors (see below), whose sum is σ = 2887015880. Its totient is φ = 824861676.

The previous prime is 1649723347. The next prime is 1649723371. The reversal of 1649723356 is 6533279461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206215416 + ... + 206215423.

Almost surely, 2^1649723356 is an apocalyptic number.

It is an amenable number.

1649723356 is a deficient number, since it is larger than the sum of its proper divisors (1237292524).

1649723356 is a wasteful number, since it uses less digits than its factorization.

1649723356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412430843 (or 412430841 counting only the distinct ones).

The product of its digits is 816480, while the sum is 46.

The square root of 1649723356 is about 40616.7866281911. The cubic root of 1649723356 is about 1181.5997062228.

The spelling of 1649723356 in words is "one billion, six hundred forty-nine million, seven hundred twenty-three thousand, three hundred fifty-six".