85422497778 has 30 divisors (see below), whose sum is σ = 191418006879. Its totient is φ = 28472925924.

The previous prime is 85422497749. The next prime is 85422497813. The reversal of 85422497778 is 87779422458.

85422497778 is a `hidden beast` number, since 8 + 54 + 22 + 497 + 7 + 78 = 666.

It can be written as a sum of positive squares in only one way, i.e., 42711248889 + 42711248889 = 206667^2 + 206667^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=206667.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 3708525 + ... + 3731487.

Almost surely, 2^85422497778 is an apocalyptic number.

85422497778 is an abundant number, since it is smaller than the sum of its proper divisors (105995509101).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85422497778 is an frugal number, since it uses more digits than its factorization.

85422497778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45940 (or 22968 counting only the distinct ones).

The product of its digits is 63221760, while the sum is 63.

The spelling of 85422497778 in words is "eighty-five billion, four hundred twenty-two million, four hundred ninety-seven thousand, seven hundred seventy-eight".