30951728639999 has 16 divisors (see below), whose sum is σ = 31658313456000. Its totient is φ = 30253910027616.

The previous prime is 30951728639989. The next prime is 30951728640011. The reversal of 30951728639999 is 99993682715903.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30951728639999 is a prime.

It is a super-2 number, since 2×30951728639999² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30951728639959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3674552 + ... + 8683650.

It is an arithmetic number, because the mean of its divisors is an integer number (1978644591000).

Almost surely, 2^{30951728639999} is an apocalyptic number.

30951728639999 is a deficient number, since it is larger than the sum of its proper divisors (706584816001).

30951728639999 is a wasteful number, since it uses less digits than its factorization.

30951728639999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5009974.

The product of its (nonzero) digits is 1785641760, while the sum is 80.

The spelling of 30951728639999 in words is "thirty trillion, nine hundred fifty-one billion, seven hundred twenty-eight million, six hundred thirty-nine thousand, nine hundred ninety-nine".