1375625643 has 16 divisors (see below), whose sum is σ = 2168474880. Its totient is φ = 758965536.

The previous prime is 1375625611. The next prime is 1375625659. The reversal of 1375625643 is 3465265731.

It is not a de Polignac number, because 1375625643 - 2⁵ = 1375625611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1375625595 and 1375625604.

It is not an unprimeable number, because it can be changed into a prime (1375625543) 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, 1128805 + ... + 1130022.

It is an arithmetic number, because the mean of its divisors is an integer number (135529680).

Almost surely, 2^1375625643 is an apocalyptic number.

1375625643 is a deficient number, since it is larger than the sum of its proper divisors (792849237).

1375625643 is a wasteful number, since it uses less digits than its factorization.

1375625643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258866.

The product of its digits is 453600, while the sum is 42.

The square root of 1375625643 is about 37089.4276445458. The cubic root of 1375625643 is about 1112.1586763866.

The spelling of 1375625643 in words is "one billion, three hundred seventy-five million, six hundred twenty-five thousand, six hundred forty-three".