1213406816715 has 12 divisors (see below), whose sum is σ = 2103238482384. Its totient is φ = 647150302224.

The previous prime is 1213406816669. The next prime is 1213406816729. The reversal of 1213406816715 is 5176186043121.

1213406816715 is a `hidden beast` number, since 1 + 213 + 406 + 8 + 16 + 7 + 15 = 666.

It is not a de Polignac number, because 1213406816715 - 2¹² = 1213406812619 is a prime.

It is a super-2 number, since 2×1213406816715² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 26964595927 = 1213406816715 / (1 + 2 + 1 + 3 + 4 + 0 + 6 + 8 + 1 + 6 + 7 + 1 + 5).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13482297919 + ... + 13482298008.

It is an arithmetic number, because the mean of its divisors is an integer number (175269873532).

Almost surely, 2^{1213406816715} is an apocalyptic number.

1213406816715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1213406816715 is a deficient number, since it is larger than the sum of its proper divisors (889831665669).

1213406816715 is a wasteful number, since it uses less digits than its factorization.

1213406816715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26964595938 (or 26964595935 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 1213406816715 in words is "one trillion, two hundred thirteen billion, four hundred six million, eight hundred sixteen thousand, seven hundred fifteen".