3649709450 has 24 divisors (see below), whose sum is σ = 7022547180. Its totient is φ = 1409542400.

The previous prime is 3649709431. The next prime is 3649709461. The reversal of 3649709450 is 549079463.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1602961369 + 2046748081 = 40037^2 + 45241^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3649709395 and 3649709404.

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, 1257071 + ... + 1259970.

Almost surely, 2^3649709450 is an apocalyptic number.

3649709450 is a deficient number, since it is larger than the sum of its proper divisors (3372837730).

3649709450 is a wasteful number, since it uses less digits than its factorization.

3649709450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517082 (or 2517077 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 47.

The square root of 3649709450 is about 60412.8252112083. The cubic root of 3649709450 is about 1539.6408689185.

The spelling of 3649709450 in words is "three billion, six hundred forty-nine million, seven hundred nine thousand, four hundred fifty".