1615461361 has 4 divisors (see below), whose sum is σ = 1616432112. Its totient is φ = 1614490612.

The previous prime is 1615461347. The next prime is 1615461389. The reversal of 1615461361 is 1631645161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1615461361 - 2⁷ = 1615461233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1615461761) 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 3 ways as a sum of consecutive naturals, for example, 482875 + ... + 486208.

It is an arithmetic number, because the mean of its divisors is an integer number (404108028).

Almost surely, 2^1615461361 is an apocalyptic number.

It is an amenable number.

1615461361 is a deficient number, since it is larger than the sum of its proper divisors (970751).

1615461361 is an equidigital number, since it uses as much as digits as its factorization.

1615461361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970750.

The product of its digits is 12960, while the sum is 34.

The square root of 1615461361 is about 40192.8023531577. The cubic root of 1615461361 is about 1173.3624658009.

The spelling of 1615461361 in words is "one billion, six hundred fifteen million, four hundred sixty-one thousand, three hundred sixty-one".