1375791646 has 8 divisors (see below), whose sum is σ = 2119462920. Its totient is φ = 669304008.

The previous prime is 1375791631. The next prime is 1375791647. The reversal of 1375791646 is 6461975731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1375791646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375791647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9295816 + ... + 9295963.

It is an arithmetic number, because the mean of its divisors is an integer number (264932865).

Almost surely, 2^1375791646 is an apocalyptic number.

1375791646 is a deficient number, since it is larger than the sum of its proper divisors (743671274).

1375791646 is a wasteful number, since it uses less digits than its factorization.

1375791646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18591818.

The product of its digits is 952560, while the sum is 49.

The square root of 1375791646 is about 37091.6654519583. The cubic root of 1375791646 is about 1112.2034110017.

The spelling of 1375791646 in words is "one billion, three hundred seventy-five million, seven hundred ninety-one thousand, six hundred forty-six".