97574489918 has 4 divisors (see below), whose sum is σ = 146361734880. Its totient is φ = 48787244958.

The previous prime is 97574489917. The next prime is 97574489927. The reversal of 97574489918 is 81998447579.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81998447579 = 32009 ⋅2561731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97574489917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24393622478 + ... + 24393622481.

It is an arithmetic number, because the mean of its divisors is an integer number (36590433720).

Almost surely, 2^97574489918 is an apocalyptic number.

97574489918 is a deficient number, since it is larger than the sum of its proper divisors (48787244962).

97574489918 is a wasteful number, since it uses less digits than its factorization.

97574489918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48787244961.

The product of its digits is 182891520, while the sum is 71.

The spelling of 97574489918 in words is "ninety-seven billion, five hundred seventy-four million, four hundred eighty-nine thousand, nine hundred eighteen".