3616978405 has 8 divisors (see below), whose sum is σ = 4351534200. Its totient is φ = 2886142656.

The previous prime is 3616978381. The next prime is 3616978433. The reversal of 3616978405 is 5048796163.

It can be written as a sum of positive squares in 4 ways, for example, as 103571329 + 3513407076 = 10177^2 + 59274^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3616978405 - 2²⁵ = 3583423973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 927870 + ... + 931759.

It is an arithmetic number, because the mean of its divisors is an integer number (543941775).

Almost surely, 2^3616978405 is an apocalyptic number.

It is an amenable number.

3616978405 is a deficient number, since it is larger than the sum of its proper divisors (734555795).

3616978405 is a wasteful number, since it uses less digits than its factorization.

3616978405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860023.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 3616978405 is about 60141.3202798209. The cubic root of 3616978405 is about 1535.0244780303.

The spelling of 3616978405 in words is "three billion, six hundred sixteen million, nine hundred seventy-eight thousand, four hundred five".