545978381 has 8 divisors (see below), whose sum is σ = 588317184. Its totient is φ = 503688240.

The previous prime is 545978359. The next prime is 545978413. The reversal of 545978381 is 183879545.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545978381 is a prime.

It is a super-2 number, since 2×545978381² = 596184785038762322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545978351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13100 + ... + 35546.

It is an arithmetic number, because the mean of its divisors is an integer number (73539648).

Almost surely, 2^545978381 is an apocalyptic number.

It is an amenable number.

545978381 is a deficient number, since it is larger than the sum of its proper divisors (42338803).

545978381 is a wasteful number, since it uses less digits than its factorization.

545978381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24331.

The product of its digits is 1209600, while the sum is 50.

The square root of 545978381 is about 23366.1802826221. The cubic root of 545978381 is about 817.3194149526.

The spelling of 545978381 in words is "five hundred forty-five million, nine hundred seventy-eight thousand, three hundred eighty-one".