9897778869019 has 8 divisors (see below), whose sum is σ = 9910563776960. Its totient is φ = 9885001665600.

The previous prime is 9897778868933. The next prime is 9897778869029. The reversal of 9897778869019 is 9109688777989.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9897778869019 - 2¹¹ = 9897778866971 is a prime.

It is a super-2 number, since 2×9897778869019² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9897778869029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647089 + ... + 4496029.

It is an arithmetic number, because the mean of its divisors is an integer number (1238820472120).

Almost surely, 2^{9897778869019} is an apocalyptic number.

9897778869019 is a deficient number, since it is larger than the sum of its proper divisors (12784907941).

9897778869019 is a wasteful number, since it uses less digits than its factorization.

9897778869019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3852261.

The product of its (nonzero) digits is 6913299456, while the sum is 88.

The spelling of 9897778869019 in words is "nine trillion, eight hundred ninety-seven billion, seven hundred seventy-eight million, eight hundred sixty-nine thousand, nineteen".