378909189136 has 15 divisors (see below), whose sum is σ = 734141324541. Its totient is φ = 189453363456.

The previous prime is 378909189107. The next prime is 378909189143. The reversal of 378909189136 is 631981909873.

The square root of 378909189136 is 615556.

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., 376696427536 + 2212761600 = 613756^2 + 47040^2 .

It is a super-2 number, since 2×378909189136² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 2385280 + ... + 2539168.

Almost surely, 2^378909189136 is an apocalyptic number.

378909189136 is the 615556-th square number.

It is an amenable number.

378909189136 is a deficient number, since it is larger than the sum of its proper divisors (355232135405).

378909189136 is an frugal number, since it uses more digits than its factorization.

378909189136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307786 (or 153891 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 64.

Multiplying 378909189136 by its sum of digits (64), we get a square (24250188104704 = 4924448²).

The spelling of 378909189136 in words is "three hundred seventy-eight billion, nine hundred nine million, one hundred eighty-nine thousand, one hundred thirty-six".