1356545605 has 4 divisors (see below), whose sum is σ = 1627854732. Its totient is φ = 1085236480.

The previous prime is 1356545591. The next prime is 1356545611. The reversal of 1356545605 is 5065456531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5065456531 = 61 ⋅83040271.

It can be written as a sum of positive squares in 2 ways, for example, as 222337921 + 1134207684 = 14911^2 + 33678^2 .

It is not a de Polignac number, because 1356545605 - 2⁵ = 1356545573 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 135654556 + ... + 135654565.

It is an arithmetic number, because the mean of its divisors is an integer number (406963683).

Almost surely, 2^1356545605 is an apocalyptic number.

It is an amenable number.

1356545605 is a deficient number, since it is larger than the sum of its proper divisors (271309127).

1356545605 is an equidigital number, since it uses as much as digits as its factorization.

1356545605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271309126.

The product of its (nonzero) digits is 270000, while the sum is 40.

The square root of 1356545605 is about 36831.3128329686. The cubic root of 1356545605 is about 1106.9928085755.

The spelling of 1356545605 in words is "one billion, three hundred fifty-six million, five hundred forty-five thousand, six hundred five".