842525378865 has 48 divisors (see below), whose sum is σ = 1470086829120. Its totient is φ = 446362151040.

The previous prime is 842525378861. The next prime is 842525378869. The reversal of 842525378865 is 568873525248.

842525378865 is a `hidden beast` number, since 8 + 4 + 252 + 5 + 378 + 8 + 6 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (842525378861) and next prime (842525378869).

It is not a de Polignac number, because 842525378865 - 2² = 842525378861 is a prime.

It is a super-2 number, since 2×842525378865² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (842525378861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14854410 + ... + 14911020.

It is an arithmetic number, because the mean of its divisors is an integer number (30626808940).

Almost surely, 2^842525378865 is an apocalyptic number.

It is an amenable number.

842525378865 is a deficient number, since it is larger than the sum of its proper divisors (627561450255).

842525378865 is a wasteful number, since it uses less digits than its factorization.

842525378865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58814 (or 58811 counting only the distinct ones).

The product of its digits is 129024000, while the sum is 63.

The spelling of 842525378865 in words is "eight hundred forty-two billion, five hundred twenty-five million, three hundred seventy-eight thousand, eight hundred sixty-five".