1378854645 has 32 divisors (see below), whose sum is σ = 2522873088. Its totient is φ = 629948928.

The previous prime is 1378854629. The next prime is 1378854667. The reversal of 1378854645 is 5464588731.

It is not a de Polignac number, because 1378854645 - 2⁴ = 1378854629 is a prime.

It is a super-3 number, since 3×1378854645³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 238327 + ... + 244043.

It is an arithmetic number, because the mean of its divisors is an integer number (78839784).

Almost surely, 2^1378854645 is an apocalyptic number.

1378854645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378854645 is a deficient number, since it is larger than the sum of its proper divisors (1144018443).

1378854645 is a wasteful number, since it uses less digits than its factorization.

1378854645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8029.

The product of its digits is 3225600, while the sum is 51.

The square root of 1378854645 is about 37132.9320819135. The cubic root of 1378854645 is about 1113.0281853322.

The spelling of 1378854645 in words is "one billion, three hundred seventy-eight million, eight hundred fifty-four thousand, six hundred forty-five".