197074385615 has 16 divisors (see below), whose sum is σ = 249236450400. Its totient is φ = 149181409152.

The previous prime is 197074385611. The next prime is 197074385633. The reversal of 197074385615 is 516583470791.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 197074385615 - 2² = 197074385611 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197074385611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1172432 + ... + 1329941.

It is an arithmetic number, because the mean of its divisors is an integer number (15577278150).

Almost surely, 2^197074385615 is an apocalyptic number.

197074385615 is a deficient number, since it is larger than the sum of its proper divisors (52162064785).

197074385615 is a wasteful number, since it uses less digits than its factorization.

197074385615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503226.

The product of its (nonzero) digits is 6350400, while the sum is 56.

The spelling of 197074385615 in words is "one hundred ninety-seven billion, seventy-four million, three hundred eighty-five thousand, six hundred fifteen".