1213387805635 has 8 divisors (see below), whose sum is σ = 1506274517520. Its totient is φ = 937237477344.

The previous prime is 1213387805599. The next prime is 1213387805659. The reversal of 1213387805635 is 5365087833121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213387805635 - 2¹¹ = 1213387803587 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4184095737 + ... + 4184096026.

It is an arithmetic number, because the mean of its divisors is an integer number (188284314690).

Almost surely, 2^{1213387805635} is an apocalyptic number.

1213387805635 is a deficient number, since it is larger than the sum of its proper divisors (292886711885).

1213387805635 is an equidigital number, since it uses as much as digits as its factorization.

1213387805635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8368191797.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 1213387805635 in words is "one trillion, two hundred thirteen billion, three hundred eighty-seven million, eight hundred five thousand, six hundred thirty-five".