378651930409 has 9 divisors (see below), whose sum is σ = 389185757751. Its totient is φ = 368395941960.

The previous prime is 378651930403. The next prime is 378651930457. The reversal of 378651930409 is 904039156873.

The square root of 378651930409 is 615347.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 338822947225 + 39828983184 = 582085^2 + 199572^2 .

It is not a de Polignac number, because 378651930409 - 2¹⁹ = 378651406121 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 378651930409.

It is not an unprimeable number, because it can be changed into a prime (378651930403) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22759524 + ... + 22776154.

Almost surely, 2^378651930409 is an apocalyptic number.

378651930409 is the 615347-th square number.

378651930409 is the 307674-th centered octagonal number.

It is an amenable number.

378651930409 is a deficient number, since it is larger than the sum of its proper divisors (10533827342).

378651930409 is an frugal number, since it uses more digits than its factorization.

378651930409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33336 (or 16668 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 378651930409 in words is "three hundred seventy-eight billion, six hundred fifty-one million, nine hundred thirty thousand, four hundred nine".