1421655343599 has 16 divisors (see below), whose sum is σ = 1898287073280. Its totient is φ = 946397742720.

The previous prime is 1421655343547. The next prime is 1421655343601. The reversal of 1421655343599 is 9953435561241.

It is a happy number.

It is not a de Polignac number, because 1421655343599 - 2¹³ = 1421655335407 is a prime.

It is a super-2 number, since 2×1421655343599² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421655343529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6939762 + ... + 7141680.

It is an arithmetic number, because the mean of its divisors is an integer number (118642942080).

Almost surely, 2^{1421655343599} is an apocalyptic number.

1421655343599 is a deficient number, since it is larger than the sum of its proper divisors (476631729681).

1421655343599 is a wasteful number, since it uses less digits than its factorization.

1421655343599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205310.

The product of its digits is 17496000, while the sum is 57.

The spelling of 1421655343599 in words is "one trillion, four hundred twenty-one billion, six hundred fifty-five million, three hundred forty-three thousand, five hundred ninety-nine".