1361253711465 has 24 divisors (see below), whose sum is σ = 2359547615880. Its totient is φ = 725989307904.

The previous prime is 1361253711371. The next prime is 1361253711473. The reversal of 1361253711465 is 5641173521631.

1361253711465 is a `hidden beast` number, since 1 + 3 + 61 + 2 + 537 + 11 + 46 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 152109360144 + 1209144351321 = 390012^2 + 1099611^2 .

It is not a de Polignac number, because 1361253711465 - 2³⁰ = 1360179969641 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 1361253711465.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2711391 + ... + 3173979.

It is an arithmetic number, because the mean of its divisors is an integer number (98314483995).

Almost surely, 2^{1361253711465} is an apocalyptic number.

1361253711465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1361253711465 is a deficient number, since it is larger than the sum of its proper divisors (998293904415).

1361253711465 is a wasteful number, since it uses less digits than its factorization.

1361253711465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527993 (or 527990 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The spelling of 1361253711465 in words is "one trillion, three hundred sixty-one billion, two hundred fifty-three million, seven hundred eleven thousand, four hundred sixty-five".