24978669139 has 4 divisors (see below), whose sum is σ = 26064698256. Its totient is φ = 23892640024.

The previous prime is 24978669127. The next prime is 24978669167. The reversal of 24978669139 is 93196687942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93196687942 = 2 ⋅46598343971.

It is a cyclic number.

It is not a de Polignac number, because 24978669139 - 2⁷ = 24978669011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24978669239) 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, 543014524 + ... + 543014569.

It is an arithmetic number, because the mean of its divisors is an integer number (6516174564).

Almost surely, 2^24978669139 is an apocalyptic number.

24978669139 is a deficient number, since it is larger than the sum of its proper divisors (1086029117).

24978669139 is a wasteful number, since it uses less digits than its factorization.

24978669139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086029116.

The product of its digits is 35271936, while the sum is 64.

The spelling of 24978669139 in words is "twenty-four billion, nine hundred seventy-eight million, six hundred sixty-nine thousand, one hundred thirty-nine".