1481620743557 has 8 divisors (see below), whose sum is σ = 1509816913920. Its totient is φ = 1453433501520.

The previous prime is 1481620743553. The next prime is 1481620743571. The reversal of 1481620743557 is 7553470261841.

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 1481620743557 - 2² = 1481620743553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1481620743499 and 1481620743508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1481620743553) 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 7 ways as a sum of consecutive naturals, for example, 1896557 + ... + 2561282.

It is an arithmetic number, because the mean of its divisors is an integer number (188727114240).

Almost surely, 2^{1481620743557} is an apocalyptic number.

It is an amenable number.

1481620743557 is a deficient number, since it is larger than the sum of its proper divisors (28196170363).

1481620743557 is an equidigital number, since it uses as much as digits as its factorization.

1481620743557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4464163.

The product of its (nonzero) digits is 5644800, while the sum is 53.

The spelling of 1481620743557 in words is "one trillion, four hundred eighty-one billion, six hundred twenty million, seven hundred forty-three thousand, five hundred fifty-seven".