395658121997 has 8 divisors (see below), whose sum is σ = 396992556576. Its totient is φ = 394323984432.

The previous prime is 395658121987. The next prime is 395658122017. The reversal of 395658121997 is 799121856593.

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

It is a cyclic number.

It is not a de Polignac number, because 395658121997 - 2¹² = 395658117901 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 (395658121987) 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, 2778578 + ... + 2917500.

It is an arithmetic number, because the mean of its divisors is an integer number (49624069572).

Almost surely, 2^395658121997 is an apocalyptic number.

It is an amenable number.

395658121997 is a deficient number, since it is larger than the sum of its proper divisors (1334434579).

395658121997 is a wasteful number, since it uses less digits than its factorization.

395658121997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148507.

The product of its digits is 36741600, while the sum is 65.

The spelling of 395658121997 in words is "three hundred ninety-five billion, six hundred fifty-eight million, one hundred twenty-one thousand, nine hundred ninety-seven".