378440832553 has 6 divisors (see below), whose sum is σ = 440227090986. Its totient is φ = 324377856432.

The previous prime is 378440832503. The next prime is 378440832571. The reversal of 378440832553 is 355238044873.

It can be written as a sum of positive squares in only one way, i.e., 213030248704 + 165410583849 = 461552^2 + 406707^2 .

It is a de Polignac number, because none of the positive numbers 2^k-378440832553 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 378440832553.

It is not an unprimeable number, because it can be changed into a prime (378440832503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3861641100 + ... + 3861641197.

It is an arithmetic number, because the mean of its divisors is an integer number (73371181831).

Almost surely, 2^378440832553 is an apocalyptic number.

It is an amenable number.

378440832553 is a deficient number, since it is larger than the sum of its proper divisors (61786258433).

378440832553 is an equidigital number, since it uses as much as digits as its factorization.

378440832553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7723282311 (or 7723282304 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 52.

The spelling of 378440832553 in words is "three hundred seventy-eight billion, four hundred forty million, eight hundred thirty-two thousand, five hundred fifty-three".