545306378 has 4 divisors (see below), whose sum is σ = 817959570. Its totient is φ = 272653188.

The previous prime is 545306369. The next prime is 545306381. The reversal of 545306378 is 873603545.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 873603545 = 5 ⋅174720709.

It can be written as a sum of positive squares in only one way, i.e., 369293089 + 176013289 = 19217^2 + 13267^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136326593 + ... + 136326596.

Almost surely, 2^545306378 is an apocalyptic number.

545306378 is a deficient number, since it is larger than the sum of its proper divisors (272653192).

545306378 is a wasteful number, since it uses less digits than its factorization.

545306378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272653191.

The product of its (nonzero) digits is 302400, while the sum is 41.

The square root of 545306378 is about 23351.7960337101. The cubic root of 545306378 is about 816.9839519796.

The spelling of 545306378 in words is "five hundred forty-five million, three hundred six thousand, three hundred seventy-eight".