1620013661415 has 12 divisors (see below), whose sum is σ = 2808023679864. Its totient is φ = 864007286064.

The previous prime is 1620013661411. The next prime is 1620013661443. The reversal of 1620013661415 is 5141663100261.

1620013661415 is a `hidden beast` number, since 1 + 6 + 2 + 0 + 0 + 1 + 36 + 614 + 1 + 5 = 666.

It is not a de Polignac number, because 1620013661415 - 2² = 1620013661411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1620013661415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620013661411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18000151749 + ... + 18000151838.

It is an arithmetic number, because the mean of its divisors is an integer number (234001973322).

Almost surely, 2^{1620013661415} is an apocalyptic number.

1620013661415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1620013661415 is a deficient number, since it is larger than the sum of its proper divisors (1188010018449).

1620013661415 is a wasteful number, since it uses less digits than its factorization.

1620013661415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36000303598 (or 36000303595 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

Adding to 1620013661415 its reverse (5141663100261), we get a palindrome (6761676761676).

The spelling of 1620013661415 in words is "one trillion, six hundred twenty billion, thirteen million, six hundred sixty-one thousand, four hundred fifteen".