3652641778 has 8 divisors (see below), whose sum is σ = 5479625772. Its totient is φ = 1826099856.

The previous prime is 3652641767. The next prime is 3652641779. The reversal of 3652641778 is 8771462563.

It can be written as a sum of positive squares in 2 ways, for example, as 3499550649 + 153091129 = 59157^2 + 12373^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (3652641779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89025 + ... + 123412.

Almost surely, 2^3652641778 is an apocalyptic number.

3652641778 is a deficient number, since it is larger than the sum of its proper divisors (1826983994).

3652641778 is a wasteful number, since it uses less digits than its factorization.

3652641778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221036.

The product of its digits is 1693440, while the sum is 49.

The square root of 3652641778 is about 60437.0894236312. The cubic root of 3652641778 is about 1540.0530956563.

The spelling of 3652641778 in words is "three billion, six hundred fifty-two million, six hundred forty-one thousand, seven hundred seventy-eight".