396224781671 has 16 divisors (see below), whose sum is σ = 413214167520. Its totient is φ = 379601925120.

The previous prime is 396224781653. The next prime is 396224781677. The reversal of 396224781671 is 176187422693.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396224781671 is a prime.

It is a super-2 number, since 2×396224781671² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396224781677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543980 + ... + 1043246.

It is an arithmetic number, because the mean of its divisors is an integer number (25825885470).

Almost surely, 2^396224781671 is an apocalyptic number.

396224781671 is a deficient number, since it is larger than the sum of its proper divisors (16989385849).

396224781671 is a wasteful number, since it uses less digits than its factorization.

396224781671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499634.

The product of its digits is 6096384, while the sum is 56.

The spelling of 396224781671 in words is "three hundred ninety-six billion, two hundred twenty-four million, seven hundred eighty-one thousand, six hundred seventy-one".