1375191645 has 16 divisors (see below), whose sum is σ = 2205329280. Its totient is φ = 731761344.

The previous prime is 1375191641. The next prime is 1375191677. The reversal of 1375191645 is 5461915731.

It is not a de Polignac number, because 1375191645 - 2² = 1375191641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1375191597 and 1375191606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375191641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97834 + ... + 111003.

It is an arithmetic number, because the mean of its divisors is an integer number (137833080).

Almost surely, 2^1375191645 is an apocalyptic number.

1375191645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1375191645 is a deficient number, since it is larger than the sum of its proper divisors (830137635).

1375191645 is a wasteful number, since it uses less digits than its factorization.

1375191645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209284.

The product of its digits is 113400, while the sum is 42.

The square root of 1375191645 is about 37083.5764860942. The cubic root of 1375191645 is about 1112.0417052682.

The spelling of 1375191645 in words is "one billion, three hundred seventy-five million, one hundred ninety-one thousand, six hundred forty-five".