1649471552 has 14 divisors (see below), whose sum is σ = 3273170238. Its totient is φ = 824735744.

The previous prime is 1649471539. The next prime is 1649471569. The reversal of 1649471552 is 2551749461.

It can be written as a sum of positive squares in only one way, i.e., 1252027456 + 397444096 = 35384^2 + 19936^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12886433 + ... + 12886560.

Almost surely, 2^1649471552 is an apocalyptic number.

It is an amenable number.

1649471552 is a deficient number, since it is larger than the sum of its proper divisors (1623698686).

1649471552 is an equidigital number, since it uses as much as digits as its factorization.

1649471552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25773005 (or 25772995 counting only the distinct ones).

The product of its digits is 302400, while the sum is 44.

The square root of 1649471552 is about 40613.6867570527. The cubic root of 1649471552 is about 1181.5395857041.

The spelling of 1649471552 in words is "one billion, six hundred forty-nine million, four hundred seventy-one thousand, five hundred fifty-two".