1213523340435 has 160 divisors (see below), whose sum is σ = 2498239784832. Its totient is φ = 552056186880.

The previous prime is 1213523340389. The next prime is 1213523340509. The reversal of 1213523340435 is 5340433253121.

1213523340435 is a `hidden beast` number, since 1 + 2 + 13 + 5 + 233 + 404 + 3 + 5 = 666.

It is not a de Polignac number, because 1213523340435 - 2¹¹ = 1213523338387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213523340435.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 608891799 + ... + 608893791.

Almost surely, 2^{1213523340435} is an apocalyptic number.

1213523340435 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1213523340435 is an abundant number, since it is smaller than the sum of its proper divisors (1284716444397).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213523340435 is a wasteful number, since it uses less digits than its factorization.

1213523340435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2955 (or 2946 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

Adding to 1213523340435 its reverse (5340433253121), we get a palindrome (6553956593556).

The spelling of 1213523340435 in words is "one trillion, two hundred thirteen billion, five hundred twenty-three million, three hundred forty thousand, four hundred thirty-five".