1213510341645 has 48 divisors (see below), whose sum is σ = 2403985588992. Its totient is φ = 554729264640.

The previous prime is 1213510341629. The next prime is 1213510341649. The reversal of 1213510341645 is 5461430153121.

1213510341645 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 5 + 1 + 0 + 3 + 4 + 1 + 645 = 666.

It is not a de Polignac number, because 1213510341645 - 2⁴ = 1213510341629 is a prime.

It is a super-3 number, since 3×1213510341645³ (a number of 37 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213510341649) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15610744 + ... + 15688286.

It is an arithmetic number, because the mean of its divisors is an integer number (50083033104).

Almost surely, 2^{1213510341645} is an apocalyptic number.

1213510341645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213510341645 is a deficient number, since it is larger than the sum of its proper divisors (1190475247347).

1213510341645 is a wasteful number, since it uses less digits than its factorization.

1213510341645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127242 (or 127239 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

Adding to 1213510341645 its reverse (5461430153121), we get a palindrome (6674940494766).

The spelling of 1213510341645 in words is "one trillion, two hundred thirteen billion, five hundred ten million, three hundred forty-one thousand, six hundred forty-five".