97878999987880 has 32 divisors (see below), whose sum is σ = 220229210003040. Its totient is φ = 39151340434240.

The previous prime is 97878999987781. The next prime is 97878999987941. The reversal of 97878999987880 is 8878999987879.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1944466 + ... + 14125825.

It is an arithmetic number, because the mean of its divisors is an integer number (6882162812595).

Almost surely, 2^{97878999987880} is an apocalyptic number.

It is an amenable number.

97878999987880 is an abundant number, since it is smaller than the sum of its proper divisors (122350210015160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97878999987880 is a wasteful number, since it uses less digits than its factorization.

97878999987880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16222569 (or 16222565 counting only the distinct ones).

The product of its (nonzero) digits is 663676747776, while the sum is 106.

The spelling of 97878999987880 in words is "ninety-seven trillion, eight hundred seventy-eight billion, nine hundred ninety-nine million, nine hundred eighty-seven thousand, eight hundred eighty".