5646305978 has 8 divisors (see below), whose sum is σ = 8475631668. Its totient is φ = 2821095424.

The previous prime is 5646305957. The next prime is 5646305983. The reversal of 5646305978 is 8795036465.

It can be written as a sum of positive squares in 2 ways, for example, as 3330097849 + 2316208129 = 57707^2 + 48127^2 .

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

It is a super-4 number, since 4×5646305978⁴ (a number of 40 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025351 + ... + 1030842.

Almost surely, 2^5646305978 is an apocalyptic number.

5646305978 is a deficient number, since it is larger than the sum of its proper divisors (2829325690).

5646305978 is a wasteful number, since it uses less digits than its factorization.

5646305978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057568.

The product of its (nonzero) digits is 5443200, while the sum is 53.

The square root of 5646305978 is about 75141.9056053278. The cubic root of 5646305978 is about 1780.6892480786.

The spelling of 5646305978 in words is "five billion, six hundred forty-six million, three hundred five thousand, nine hundred seventy-eight".