85420178851 has 16 divisors (see below), whose sum is σ = 103999762944. Its totient is φ = 68487617664.

The previous prime is 85420178821. The next prime is 85420178887. The reversal of 85420178851 is 15887102458.

It is a happy number.

It is not a de Polignac number, because 85420178851 - 2³¹ = 83272695203 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85420178795 and 85420178804.

It is not an unprimeable number, because it can be changed into a prime (85420178821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2182495 + ... + 2221288.

It is an arithmetic number, because the mean of its divisors is an integer number (6499985184).

Almost surely, 2^85420178851 is an apocalyptic number.

85420178851 is a deficient number, since it is larger than the sum of its proper divisors (18579584093).

85420178851 is a wasteful number, since it uses less digits than its factorization.

85420178851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4403970.

The product of its (nonzero) digits is 716800, while the sum is 49.

The spelling of 85420178851 in words is "eighty-five billion, four hundred twenty million, one hundred seventy-eight thousand, eight hundred fifty-one".