1549421690613 has 32 divisors (see below), whose sum is σ = 2229622402176. Its totient is φ = 953444364288.

The previous prime is 1549421690591. The next prime is 1549421690683. The reversal of 1549421690613 is 3160961249451.

It is not a de Polignac number, because 1549421690613 - 2¹³ = 1549421682421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1549421690683) 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 31 ways as a sum of consecutive naturals, for example, 6414570 + ... + 6651732.

It is an arithmetic number, because the mean of its divisors is an integer number (69675700068).

Almost surely, 2^{1549421690613} is an apocalyptic number.

It is an amenable number.

1549421690613 is a deficient number, since it is larger than the sum of its proper divisors (680200711563).

1549421690613 is a wasteful number, since it uses less digits than its factorization.

1549421690613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239653.

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 1549421690613 in words is "one trillion, five hundred forty-nine billion, four hundred twenty-one million, six hundred ninety thousand, six hundred thirteen".