1395533661 has 8 divisors (see below), whose sum is σ = 1891215264. Its totient is φ = 915103920.

The previous prime is 1395533651. The next prime is 1395533701. The reversal of 1395533661 is 1663355931.

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

It is not a de Polignac number, because 1395533661 - 2⁶ = 1395533597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1395533611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3812751 + ... + 3813116.

It is an arithmetic number, because the mean of its divisors is an integer number (236401908).

Almost surely, 2^1395533661 is an apocalyptic number.

It is an amenable number.

1395533661 is a deficient number, since it is larger than the sum of its proper divisors (495681603).

1395533661 is an equidigital number, since it uses as much as digits as its factorization.

1395533661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7625931.

The product of its digits is 218700, while the sum is 42.

The square root of 1395533661 is about 37356.8422246849. The cubic root of 1395533661 is about 1117.4980452298.

The spelling of 1395533661 in words is "one billion, three hundred ninety-five million, five hundred thirty-three thousand, six hundred sixty-one".