197911074816 has 768 divisors, whose sum is σ = 741749299200. Its totient is φ = 50737840128.

The previous prime is 197911074773. The next prime is 197911074869. The reversal of 197911074816 is 618470119791.

It is a tau number, because it is divible by the number of its divisors (768).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 186181101 + ... + 186182163.

It is an arithmetic number, because the mean of its divisors is an integer number (965819400).

Almost surely, 2^197911074816 is an apocalyptic number.

197911074816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197911074816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370874649600).

197911074816 is an abundant number, since it is smaller than the sum of its proper divisors (543838224384).

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

197911074816 is a wasteful number, since it uses less digits than its factorization.

197911074816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 1125 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 54.

The spelling of 197911074816 in words is "one hundred ninety-seven billion, nine hundred eleven million, seventy-four thousand, eight hundred sixteen".