1648551964 has 6 divisors (see below), whose sum is σ = 2884965944. Its totient is φ = 824275980.

The previous prime is 1648551959. The next prime is 1648551991. The reversal of 1648551964 is 4691558461.

It is a happy number.

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, 206068992 + ... + 206068999.

Almost surely, 2^1648551964 is an apocalyptic number.

It is an amenable number.

1648551964 is a deficient number, since it is larger than the sum of its proper divisors (1236413980).

1648551964 is a wasteful number, since it uses less digits than its factorization.

1648551964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412137995 (or 412137993 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 49.

The square root of 1648551964 is about 40602.3640198450. The cubic root of 1648551964 is about 1181.3199736308.

The spelling of 1648551964 in words is "one billion, six hundred forty-eight million, five hundred fifty-one thousand, nine hundred sixty-four".