1618710961 has 8 divisors (see below), whose sum is σ = 1881311040. Its totient is φ = 1363949808.

The previous prime is 1618710937. The next prime is 1618710983. The reversal of 1618710961 is 1690178161.

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 1618710961 - 2¹⁹ = 1618186673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1618710901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1959286 + ... + 1960111.

It is an arithmetic number, because the mean of its divisors is an integer number (235163880).

Almost surely, 2^1618710961 is an apocalyptic number.

It is an amenable number.

1618710961 is a deficient number, since it is larger than the sum of its proper divisors (262600079).

1618710961 is an equidigital number, since it uses as much as digits as its factorization.

1618710961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3919463.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 1618710961 is about 40233.2071925667. The cubic root of 1618710961 is about 1174.1487024652.

The spelling of 1618710961 in words is "one billion, six hundred eighteen million, seven hundred ten thousand, nine hundred sixty-one".