397983614551 has 4 divisors (see below), whose sum is σ = 418930120600. Its totient is φ = 377037108504.

The previous prime is 397983614543. The next prime is 397983614563. The reversal of 397983614551 is 155416389793.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 397983614551 - 2³ = 397983614543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397983614551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397983614051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10473252996 + ... + 10473253033.

It is an arithmetic number, because the mean of its divisors is an integer number (104732530150).

Almost surely, 2^397983614551 is an apocalyptic number.

397983614551 is a deficient number, since it is larger than the sum of its proper divisors (20946506049).

397983614551 is a wasteful number, since it uses less digits than its factorization.

397983614551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20946506048.

The product of its digits is 24494400, while the sum is 61.

The spelling of 397983614551 in words is "three hundred ninety-seven billion, nine hundred eighty-three million, six hundred fourteen thousand, five hundred fifty-one".