42856977249 has 6 divisors (see below), whose sum is σ = 61904522706. Its totient is φ = 28571318160.

The previous prime is 42856977103. The next prime is 42856977281. The reversal of 42856977249 is 94277965824.

42856977249 is a `hidden beast` number, since 4 + 28 + 569 + 7 + 7 + 2 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22810665024 + 20046312225 = 151032^2 + 141585^2 .

It is not a de Polignac number, because 42856977249 - 2⁸ = 42856976993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42856977749) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2380943172 + ... + 2380943189.

It is an arithmetic number, because the mean of its divisors is an integer number (10317420451).

Almost surely, 2^42856977249 is an apocalyptic number.

It is an amenable number.

42856977249 is a deficient number, since it is larger than the sum of its proper divisors (19047545457).

42856977249 is a wasteful number, since it uses less digits than its factorization.

42856977249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4761886367 (or 4761886364 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 63.

The spelling of 42856977249 in words is "forty-two billion, eight hundred fifty-six million, nine hundred seventy-seven thousand, two hundred forty-nine".