1557061102361 has 4 divisors (see below), whose sum is σ = 1573113278772. Its totient is φ = 1541008925952.

The previous prime is 1557061102309. The next prime is 1557061102391. The reversal of 1557061102361 is 1632011607551.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 656424040000 + 900637062361 = 810200^2 + 949019^2 .

It is a cyclic number.

It is not a de Polignac number, because 1557061102361 - 2¹⁸ = 1557060840217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1557061102391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8026088060 + ... + 8026088253.

It is an arithmetic number, because the mean of its divisors is an integer number (393278319693).

Almost surely, 2^{1557061102361} is an apocalyptic number.

It is an amenable number.

1557061102361 is a deficient number, since it is larger than the sum of its proper divisors (16052176411).

1557061102361 is an equidigital number, since it uses as much as digits as its factorization.

1557061102361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16052176410.

The product of its (nonzero) digits is 37800, while the sum is 38.

The spelling of 1557061102361 in words is "one trillion, five hundred fifty-seven billion, sixty-one million, one hundred two thousand, three hundred sixty-one".