1378086645 has 64 divisors (see below), whose sum is σ = 2449923840. Its totient is φ = 657082368.

The previous prime is 1378086637. The next prime is 1378086683. The reversal of 1378086645 is 5466808731.

It is not a de Polignac number, because 1378086645 - 2³ = 1378086637 is a prime.

It is a super-2 number, since 2×1378086645² = 3798245602254712050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1378086594 and 1378086603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2950702 + ... + 2951168.

It is an arithmetic number, because the mean of its divisors is an integer number (38280060).

Almost surely, 2^1378086645 is an apocalyptic number.

1378086645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378086645 is a deficient number, since it is larger than the sum of its proper divisors (1071837195).

1378086645 is a wasteful number, since it uses less digits than its factorization.

1378086645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934.

The product of its (nonzero) digits is 967680, while the sum is 48.

The square root of 1378086645 is about 37122.5894166881. The cubic root of 1378086645 is about 1112.8215006506.

It can be divided in two parts, 1378086 and 645, that added together give a palindrome (1378731).

The spelling of 1378086645 in words is "one billion, three hundred seventy-eight million, eighty-six thousand, six hundred forty-five".