73978216197 has 8 divisors (see below), whose sum is σ = 100026884160. Its totient is φ = 48624179520.

The previous prime is 73978216177. The next prime is 73978216241. The reversal of 73978216197 is 79161287937.

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

It is not a de Polignac number, because 73978216197 - 2¹⁶ = 73978150661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73978216197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73978216177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173657572 + ... + 173657997.

It is an arithmetic number, because the mean of its divisors is an integer number (12503360520).

Almost surely, 2^73978216197 is an apocalyptic number.

It is an amenable number.

73978216197 is a deficient number, since it is larger than the sum of its proper divisors (26048667963).

73978216197 is a wasteful number, since it uses less digits than its factorization.

73978216197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347315643.

The product of its digits is 8001504, while the sum is 60.

The spelling of 73978216197 in words is "seventy-three billion, nine hundred seventy-eight million, two hundred sixteen thousand, one hundred ninety-seven".