194401996597 has 6 divisors (see below), whose sum is σ = 197641162914. Its totient is φ = 191215074960.

The previous prime is 194401996573. The next prime is 194401996603. The reversal of 194401996597 is 795699104491.

It can be written as a sum of positive squares in 3 ways, for example, as 215473041 + 194186523556 = 14679^2 + 440666^2 .

It is a de Polignac number, because none of the positive numbers 2^k-194401996597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194401966597) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26118558 + ... + 26125999.

It is an arithmetic number, because the mean of its divisors is an integer number (32940193819).

Almost surely, 2^194401996597 is an apocalyptic number.

It is an amenable number.

194401996597 is a deficient number, since it is larger than the sum of its proper divisors (3239166317).

194401996597 is an frugal number, since it uses more digits than its factorization.

194401996597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52244679 (or 52244618 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 64.

The spelling of 194401996597 in words is "one hundred ninety-four billion, four hundred one million, nine hundred ninety-six thousand, five hundred ninety-seven".