378834755641 has 4 divisors (see below), whose sum is σ = 378836881792. Its totient is φ = 378832629492.

The previous prime is 378834755627. The next prime is 378834755699. The reversal of 378834755641 is 146557438873.

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, and also an emirpimes, since its reverse is a distinct semiprime: 146557438873 = 241 ⋅608122153.

It is a cyclic number.

It is not a de Polignac number, because 378834755641 - 2⁵ = 378834755609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 378834755641.

It is not an unprimeable number, because it can be changed into a prime (378834755041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768621 + ... + 1161226.

It is an arithmetic number, because the mean of its divisors is an integer number (94709220448).

Almost surely, 2^378834755641 is an apocalyptic number.

It is an amenable number.

378834755641 is a deficient number, since it is larger than the sum of its proper divisors (2126151).

378834755641 is a wasteful number, since it uses less digits than its factorization.

378834755641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126150.

The product of its digits is 67737600, while the sum is 61.

The spelling of 378834755641 in words is "three hundred seventy-eight billion, eight hundred thirty-four million, seven hundred fifty-five thousand, six hundred forty-one".