97158136842 has 72 divisors (see below), whose sum is σ = 228029319648. Its totient is φ = 29884140000.

The previous prime is 97158136787. The next prime is 97158136843. The reversal of 97158136842 is 24863185179.

97158136842 is a `hidden beast` number, since 97 + 158 + 1 + 368 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (97158136843) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 15057717 + ... + 15064167.

It is an arithmetic number, because the mean of its divisors is an integer number (3167073884).

Almost surely, 2^97158136842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97158136842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114014659824).

97158136842 is an abundant number, since it is smaller than the sum of its proper divisors (130871182806).

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

97158136842 is a wasteful number, since it uses less digits than its factorization.

97158136842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11436 (or 11420 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 97158136842 in words is "ninety-seven billion, one hundred fifty-eight million, one hundred thirty-six thousand, eight hundred forty-two".