97826772418 has 4 divisors (see below), whose sum is σ = 146740158630. Its totient is φ = 48913386208.

The previous prime is 97826772401. The next prime is 97826772437. The reversal of 97826772418 is 81427762879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81427762879 = 359 ⋅226818281.

It can be written as a sum of positive squares in only one way, i.e., 83170522449 + 14656249969 = 288393^2 + 121063^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24456693103 + ... + 24456693106.

Almost surely, 2^97826772418 is an apocalyptic number.

97826772418 is a deficient number, since it is larger than the sum of its proper divisors (48913386212).

97826772418 is a wasteful number, since it uses less digits than its factorization.

97826772418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48913386211.

The product of its digits is 18966528, while the sum is 61.

The spelling of 97826772418 in words is "ninety-seven billion, eight hundred twenty-six million, seven hundred seventy-two thousand, four hundred eighteen".