378641172549 has 4 divisors (see below), whose sum is σ = 504854896736. Its totient is φ = 252427448364.

The previous prime is 378641172491. The next prime is 378641172583. The reversal of 378641172549 is 945271146873.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 378641172549 - 2⁸ = 378641172293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378641172589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63106862089 + ... + 63106862094.

It is an arithmetic number, because the mean of its divisors is an integer number (126213724184).

Almost surely, 2^378641172549 is an apocalyptic number.

It is an amenable number.

378641172549 is a deficient number, since it is larger than the sum of its proper divisors (126213724187).

378641172549 is a wasteful number, since it uses less digits than its factorization.

378641172549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126213724186.

The product of its digits is 10160640, while the sum is 57.

The spelling of 378641172549 in words is "three hundred seventy-eight billion, six hundred forty-one million, one hundred seventy-two thousand, five hundred forty-nine".