5646979521 has 12 divisors (see below), whose sum is σ = 8163122448. Its totient is φ = 3761711064.

The previous prime is 5646979519. The next prime is 5646979543. The reversal of 5646979521 is 1259796465.

5646979521 is a `hidden beast` number, since 5 + 6 + 46 + 9 + 79 + 521 = 666.

It is not a de Polignac number, because 5646979521 - 2¹ = 5646979519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5646979501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232975 + ... + 256068.

It is an arithmetic number, because the mean of its divisors is an integer number (680260204).

Almost surely, 2^5646979521 is an apocalyptic number.

It is an amenable number.

5646979521 is a deficient number, since it is larger than the sum of its proper divisors (2516142927).

5646979521 is a wasteful number, since it uses less digits than its factorization.

5646979521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490332 (or 490329 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The square root of 5646979521 is about 75146.3872784314. The cubic root of 5646979521 is about 1780.7600508946.

The spelling of 5646979521 in words is "five billion, six hundred forty-six million, nine hundred seventy-nine thousand, five hundred twenty-one".