85615451658 has 64 divisors (see below), whose sum is σ = 208639549440. Its totient is φ = 25808209200.

The previous prime is 85615451651. The next prime is 85615451671.

85615451658 is a `hidden beast` number, since 8 + 5 + 615 + 4 + 5 + 16 + 5 + 8 = 666.

85615451658 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85615451651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 263860 + ... + 490767.

It is an arithmetic number, because the mean of its divisors is an integer number (3259992960).

Almost surely, 2^85615451658 is an apocalyptic number.

85615451658 is an abundant number, since it is smaller than the sum of its proper divisors (123024097782).

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

85615451658 is a wasteful number, since it uses less digits than its factorization.

85615451658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754840 (or 754834 counting only the distinct ones).

The product of its digits is 5760000, while the sum is 54.

The spelling of 85615451658 in words is "eighty-five billion, six hundred fifteen million, four hundred fifty-one thousand, six hundred fifty-eight".