68490030436 has 81 divisors (see below), whose sum is σ = 129640979097. Its totient is φ = 31655957760.

The previous prime is 68490030431. The next prime is 68490030439. The reversal of 68490030436 is 63403009486.

The square root of 68490030436 is 261706.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 30754636900 + 37735393536 = 175370^2 + 194256^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68490030392 and 68490030401.

It is not an unprimeable number, because it can be changed into a prime (68490030431) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 706082740 + ... + 706082836.

Almost surely, 2^68490030436 is an apocalyptic number.

68490030436 is the 261706-th square number.

It is an amenable number.

68490030436 is a deficient number, since it is larger than the sum of its proper divisors (61150948661).

68490030436 is an equidigital number, since it uses as much as digits as its factorization.

68490030436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 43.

The spelling of 68490030436 in words is "sixty-eight billion, four hundred ninety million, thirty thousand, four hundred thirty-six".