397767885615 has 48 divisors (see below), whose sum is σ = 708194637696. Its totient is φ = 206381260800.

The previous prime is 397767885611. The next prime is 397767885629. The reversal of 397767885615 is 516588767793.

It is not a de Polignac number, because 397767885615 - 2² = 397767885611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397767885611) 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 47 ways as a sum of consecutive naturals, for example, 18822255 + ... + 18843375.

It is an arithmetic number, because the mean of its divisors is an integer number (14754054952).

Almost surely, 2^397767885615 is an apocalyptic number.

397767885615 is a deficient number, since it is larger than the sum of its proper divisors (310426752081).

397767885615 is a wasteful number, since it uses less digits than its factorization.

397767885615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32480 (or 32477 counting only the distinct ones).

The product of its digits is 533433600, while the sum is 72.

The spelling of 397767885615 in words is "three hundred ninety-seven billion, seven hundred sixty-seven million, eight hundred eighty-five thousand, six hundred fifteen".