30138678457 has 16 divisors (see below), whose sum is σ = 31571895168. Its totient is φ = 28746748800.

The previous prime is 30138678443. The next prime is 30138678469. The reversal of 30138678457 is 75487683103.

It is a cyclic number.

It is not a de Polignac number, because 30138678457 - 2¹⁵ = 30138645689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30138648457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269508 + ... + 364570.

It is an arithmetic number, because the mean of its divisors is an integer number (1973243448).

Almost surely, 2^30138678457 is an apocalyptic number.

It is an amenable number.

30138678457 is a deficient number, since it is larger than the sum of its proper divisors (1433216711).

30138678457 is a wasteful number, since it uses less digits than its factorization.

30138678457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95280.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 30138678457 in words is "thirty billion, one hundred thirty-eight million, six hundred seventy-eight thousand, four hundred fifty-seven".