1618446955 has 8 divisors (see below), whose sum is σ = 1978780752. Its totient is φ = 1270327968.

The previous prime is 1618446919. The next prime is 1618446989. The reversal of 1618446955 is 5596448161.

It is a happy number.

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 1618446955 - 2²¹ = 1616349803 is a prime.

It is a super-4 number, since 4×1618446955⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1618446899 and 1618446908.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3053409 + ... + 3053938.

It is an arithmetic number, because the mean of its divisors is an integer number (247347594).

Almost surely, 2^1618446955 is an apocalyptic number.

1618446955 is a deficient number, since it is larger than the sum of its proper divisors (360333797).

1618446955 is an equidigital number, since it uses as much as digits as its factorization.

1618446955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6107405.

The product of its digits is 1036800, while the sum is 49.

The square root of 1618446955 is about 40229.9261122861. The cubic root of 1618446955 is about 1174.0848658356.

The spelling of 1618446955 in words is "one billion, six hundred eighteen million, four hundred forty-six thousand, nine hundred fifty-five".