97638347855 has 4 divisors (see below), whose sum is σ = 117166017432. Its totient is φ = 78110678280.

The previous prime is 97638347827. The next prime is 97638347861. The reversal of 97638347855 is 55874383679.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55874383679 = 127 ⋅439955777.

It is a de Polignac number, because none of the positive numbers 2^k-97638347855 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97638347791 and 97638347800.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 9763834781 + ... + 9763834790.

It is an arithmetic number, because the mean of its divisors is an integer number (29291504358).

Almost surely, 2^97638347855 is an apocalyptic number.

97638347855 is a deficient number, since it is larger than the sum of its proper divisors (19527669577).

97638347855 is a wasteful number, since it uses less digits than its factorization.

97638347855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19527669576.

The product of its digits is 152409600, while the sum is 65.

The spelling of 97638347855 in words is "ninety-seven billion, six hundred thirty-eight million, three hundred forty-seven thousand, eight hundred fifty-five".