378777543 has 8 divisors (see below), whose sum is σ = 508061568. Its totient is φ = 251005944.

The previous prime is 378777523. The next prime is 378777551. The reversal of 378777543 is 345777873.

It is a happy number.

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

It is not a de Polignac number, because 378777543 - 2⁹ = 378777031 is a prime.

It is a super-2 number, since 2×378777543² = 286944854162233698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378777523) 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, 377521 + ... + 378522.

It is an arithmetic number, because the mean of its divisors is an integer number (63507696).

Almost surely, 2^378777543 is an apocalyptic number.

378777543 is a deficient number, since it is larger than the sum of its proper divisors (129284025).

378777543 is a wasteful number, since it uses less digits than its factorization.

378777543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756213.

The product of its digits is 3457440, while the sum is 51.

The square root of 378777543 is about 19462.2080710283. The cubic root of 378777543 is about 723.5381040636.

The spelling of 378777543 in words is "three hundred seventy-eight million, seven hundred seventy-seven thousand, five hundred forty-three".