1375637545 has 4 divisors (see below), whose sum is σ = 1650765060. Its totient is φ = 1100510032.

The previous prime is 1375637539. The next prime is 1375637561. The reversal of 1375637545 is 5457365731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 658897561 + 716739984 = 25669^2 + 26772^2 .

It is a cyclic number.

It is not a de Polignac number, because 1375637545 - 2⁵ = 1375637513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1375637495 and 1375637504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137563750 + ... + 137563759.

It is an arithmetic number, because the mean of its divisors is an integer number (412691265).

Almost surely, 2^1375637545 is an apocalyptic number.

It is an amenable number.

1375637545 is a deficient number, since it is larger than the sum of its proper divisors (275127515).

1375637545 is an equidigital number, since it uses as much as digits as its factorization.

1375637545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275127514.

The product of its digits is 1323000, while the sum is 46.

The square root of 1375637545 is about 37089.5880942347. The cubic root of 1375637545 is about 1112.1618838664.

The spelling of 1375637545 in words is "one billion, three hundred seventy-five million, six hundred thirty-seven thousand, five hundred forty-five".