97878518553 has 16 divisors (see below), whose sum is σ = 133019962560. Its totient is φ = 63995690304.

The previous prime is 97878518533. The next prime is 97878518561. The reversal of 97878518553 is 35581587879.

It is not a de Polignac number, because 97878518553 - 2¹⁶ = 97878453017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97878518513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282475 + ... + 524927.

It is an arithmetic number, because the mean of its divisors is an integer number (8313747660).

Almost surely, 2^97878518553 is an apocalyptic number.

It is an amenable number.

97878518553 is a deficient number, since it is larger than the sum of its proper divisors (35141444007).

97878518553 is a wasteful number, since it uses less digits than its factorization.

97878518553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245048.

The product of its digits is 84672000, while the sum is 66.

The spelling of 97878518553 in words is "ninety-seven billion, eight hundred seventy-eight million, five hundred eighteen thousand, five hundred fifty-three".