196354040391 has 24 divisors (see below), whose sum is σ = 293527990080. Its totient is φ = 126334789056.

The previous prime is 196354040383. The next prime is 196354040431. The reversal of 196354040391 is 193040453691.

196354040391 is a `hidden beast` number, since 1 + 9 + 63 + 540 + 40 + 3 + 9 + 1 = 666.

It is not a de Polignac number, because 196354040391 - 2³ = 196354040383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196354040341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 455586 + ... + 774768.

It is an arithmetic number, because the mean of its divisors is an integer number (12230332920).

Almost surely, 2^196354040391 is an apocalyptic number.

196354040391 is a deficient number, since it is larger than the sum of its proper divisors (97173949689).

196354040391 is a wasteful number, since it uses less digits than its factorization.

196354040391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321575 (or 321572 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 196354040391 in words is "one hundred ninety-six billion, three hundred fifty-four million, forty thousand, three hundred ninety-one".