42847438450861 has 64 divisors (see below), whose sum is σ = 52665938519040. Its totient is φ = 34353880704000.

The previous prime is 42847438450853. The next prime is 42847438450907. The reversal of 42847438450861 is 16805483474824.

It is not a de Polignac number, because 42847438450861 - 2³ = 42847438450853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42847438450793 and 42847438450802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42847438450261) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 142741071 + ... + 143040931.

It is an arithmetic number, because the mean of its divisors is an integer number (822905289360).

Almost surely, 2^{42847438450861} is an apocalyptic number.

It is an amenable number.

42847438450861 is a deficient number, since it is larger than the sum of its proper divisors (9818500068179).

42847438450861 is a wasteful number, since it uses less digits than its factorization.

42847438450861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300346.

The product of its (nonzero) digits is 165150720, while the sum is 64.

The spelling of 42847438450861 in words is "forty-two trillion, eight hundred forty-seven billion, four hundred thirty-eight million, four hundred fifty thousand, eight hundred sixty-one".