30668728815 has 48 divisors (see below), whose sum is σ = 55707454560. Its totient is φ = 16008485760.

The previous prime is 30668728801. The next prime is 30668728859. The reversal of 30668728815 is 51882786603.

It is not a de Polignac number, because 30668728815 - 2⁶ = 30668728751 is a prime.

It is a super-2 number, since 2×30668728815² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 246795 + ... + 349635.

It is an arithmetic number, because the mean of its divisors is an integer number (1160571970).

Almost surely, 2^30668728815 is an apocalyptic number.

30668728815 is a deficient number, since it is larger than the sum of its proper divisors (25038725745).

30668728815 is a wasteful number, since it uses less digits than its factorization.

30668728815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102949 (or 102896 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 30668728815 in words is "thirty billion, six hundred sixty-eight million, seven hundred twenty-eight thousand, eight hundred fifteen".