378861623667 has 12 divisors (see below), whose sum is σ = 547534292760. Its totient is φ = 252440696448.

The previous prime is 378861623551. The next prime is 378861623681. The reversal of 378861623667 is 766326168873.

378861623667 is a `hidden beast` number, since 3 + 7 + 8 + 8 + 616 + 2 + 3 + 6 + 6 + 7 = 666.

It is not a de Polignac number, because 378861623667 - 2⁸ = 378861623411 is a prime.

It is a super-2 number, since 2×378861623667² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (378861624667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11125333 + ... + 11159334.

It is an arithmetic number, because the mean of its divisors is an integer number (45627857730).

Almost surely, 2^378861623667 is an apocalyptic number.

378861623667 is a deficient number, since it is larger than the sum of its proper divisors (168672669093).

378861623667 is a wasteful number, since it uses less digits than its factorization.

378861623667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22286562 (or 22286559 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 63.

The spelling of 378861623667 in words is "three hundred seventy-eight billion, eight hundred sixty-one million, six hundred twenty-three thousand, six hundred sixty-seven".