13465840545 has 40 divisors (see below), whose sum is σ = 24292630824. Its totient is φ = 7136004096.

The previous prime is 13465840519. The next prime is 13465840571. The reversal of 13465840545 is 54504856431.

13465840545 is a `hidden beast` number, since 1 + 3 + 4 + 65 + 8 + 40 + 545 = 666.

It is an interprime number because it is at equal distance from previous prime (13465840519) and next prime (13465840571).

It can be written as a sum of positive squares in 4 ways, for example, as 1512354321 + 11953486224 = 38889^2 + 109332^2 .

It is not a de Polignac number, because 13465840545 - 2¹³ = 13465832353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 13465840545.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 42304 + ... + 169473.

Almost surely, 2^13465840545 is an apocalyptic number.

13465840545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13465840545 is a deficient number, since it is larger than the sum of its proper divisors (10826790279).

13465840545 is a wasteful number, since it uses less digits than its factorization.

13465840545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211951 (or 211942 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 45.

The spelling of 13465840545 in words is "thirteen billion, four hundred sixty-five million, eight hundred forty thousand, five hundred forty-five".