97857075878 has 12 divisors (see below), whose sum is σ = 147397384980. Its totient is φ = 48725457120.

The previous prime is 97857075871. The next prime is 97857075931. The reversal of 97857075878 is 87857075879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97857075871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 305048 + ... + 537371.

It is an arithmetic number, because the mean of its divisors is an integer number (12283115415).

Almost surely, 2^97857075878 is an apocalyptic number.

97857075878 is a deficient number, since it is larger than the sum of its proper divisors (49540309102).

97857075878 is an equidigital number, since it uses as much as digits as its factorization.

97857075878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842903 (or 842662 counting only the distinct ones).

The product of its (nonzero) digits is 276595200, while the sum is 71.

Subtracting from 97857075878 its reverse (87857075879), we obtain a palindrome (9999999999).

The spelling of 97857075878 in words is "ninety-seven billion, eight hundred fifty-seven million, seventy-five thousand, eight hundred seventy-eight".