378858887661 has 8 divisors (see below), whose sum is σ = 513706966560. Its totient is φ = 248291700272.

The previous prime is 378858887597. The next prime is 378858887663. The reversal of 378858887661 is 166788858873.

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 378858887661 - 2⁶ = 378858887597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378858887663) 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, 1070222670 + ... + 1070223023.

It is an arithmetic number, because the mean of its divisors is an integer number (64213370820).

Almost surely, 2^378858887661 is an apocalyptic number.

It is an amenable number.

378858887661 is a deficient number, since it is larger than the sum of its proper divisors (134848078899).

378858887661 is a wasteful number, since it uses less digits than its factorization.

378858887661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140445755.

The product of its digits is 867041280, while the sum is 75.

The spelling of 378858887661 in words is "three hundred seventy-eight billion, eight hundred fifty-eight million, eight hundred eighty-seven thousand, six hundred sixty-one".