85541797908 has 144 divisors (see below), whose sum is σ = 253996462720. Its totient is φ = 23761527552.

The previous prime is 85541797907. The next prime is 85541797963. The reversal of 85541797908 is 80979714558.

85541797908 is a `hidden beast` number, since 8 + 554 + 1 + 7 + 9 + 79 + 0 + 8 = 666.

It is a super-2 number, since 2×85541797908² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85541797903) 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, 15782823 + ... + 15788241.

Almost surely, 2^85541797908 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85541797908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126998231360).

85541797908 is an abundant number, since it is smaller than the sum of its proper divisors (168454664812).

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

85541797908 is a wasteful number, since it uses less digits than its factorization.

85541797908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7166 (or 7161 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 63.

The spelling of 85541797908 in words is "eighty-five billion, five hundred forty-one million, seven hundred ninety-seven thousand, nine hundred eight".