97878999987879 has 16 divisors (see below), whose sum is σ = 142378422314880. Its totient is φ = 59316869475360.

The previous prime is 97878999987781. The next prime is 97878999987941.

97878999987879 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 97878999987879 - 2¹¹ = 97878999985831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97878999987779) 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 in 15 ways as a sum of consecutive naturals, for example, 92882569 + ... + 93930450.

It is an arithmetic number, because the mean of its divisors is an integer number (8898651394680).

Almost surely, 2^{97878999987879} is an apocalyptic number.

97878999987879 is a deficient number, since it is larger than the sum of its proper divisors (44499422327001).

97878999987879 is a wasteful number, since it uses less digits than its factorization.

97878999987879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186828910.

The product of its digits is 5226454388736, while the sum is 114.

The spelling of 97878999987879 in words is "ninety-seven trillion, eight hundred seventy-eight billion, nine hundred ninety-nine million, nine hundred eighty-seven thousand, eight hundred seventy-nine".