68649479530 has 8 divisors (see below), whose sum is σ = 123569063172. Its totient is φ = 27459791808.

The previous prime is 68649479497. The next prime is 68649479537. The reversal of 68649479530 is 3597494686.

It can be written as a sum of positive squares in 2 ways, for example, as 65412666081 + 3236813449 = 255759^2 + 56893^2 .

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 (68649479537) 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, 3432473967 + ... + 3432473986.

Almost surely, 2^68649479530 is an apocalyptic number.

68649479530 is a deficient number, since it is larger than the sum of its proper divisors (54919583642).

68649479530 is a wasteful number, since it uses less digits than its factorization.

68649479530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6864947960.

The product of its (nonzero) digits is 39191040, while the sum is 61.

The spelling of 68649479530 in words is "sixty-eight billion, six hundred forty-nine million, four hundred seventy-nine thousand, five hundred thirty".