618954901 has 8 divisors (see below), whose sum is σ = 639667224. Its totient is φ = 598510080.

The previous prime is 618954883. The next prime is 618954923. The reversal of 618954901 is 109459816.

It can be written as a sum of positive squares in 4 ways, for example, as 3418801 + 615536100 = 1849^2 + 24810^2 .

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 618954901 - 2¹⁹ = 618430613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618954961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62166 + ... + 71431.

It is an arithmetic number, because the mean of its divisors is an integer number (79958403).

Almost surely, 2^618954901 is an apocalyptic number.

It is an amenable number.

618954901 is a deficient number, since it is larger than the sum of its proper divisors (20712323).

618954901 is a wasteful number, since it uses less digits than its factorization.

618954901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133751.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 618954901 is about 24878.8042518124. The cubic root of 618954901 is about 852.2225117177. Note that the first 3 decimals are identical.

The spelling of 618954901 in words is "six hundred eighteen million, nine hundred fifty-four thousand, nine hundred one".