97987654855 has 4 divisors (see below), whose sum is σ = 117585185832. Its totient is φ = 78390123880.

The previous prime is 97987654847. The next prime is 97987654907. The reversal of 97987654855 is 55845678979.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 97987654855 - 2³ = 97987654847 is a prime.

It is a super-3 number, since 3×97987654855³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9798765481 + ... + 9798765490.

It is an arithmetic number, because the mean of its divisors is an integer number (29396296458).

Almost surely, 2^97987654855 is an apocalyptic number.

97987654855 is a deficient number, since it is larger than the sum of its proper divisors (19597530977).

97987654855 is a wasteful number, since it uses less digits than its factorization.

97987654855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19597530976.

The product of its digits is 762048000, while the sum is 73.

The spelling of 97987654855 in words is "ninety-seven billion, nine hundred eighty-seven million, six hundred fifty-four thousand, eight hundred fifty-five".