618475290625 has 12 divisors (see below), whose sum is σ = 773044639164. Its totient is φ = 494780230000.

The previous prime is 618475290607. The next prime is 618475290649. The reversal of 618475290625 is 526092574816.

It is a Cunningham number, because it is equal to 786432²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 614917883889 + 3557406736 = 784167^2 + 59644^2 .

It is not a de Polignac number, because 618475290625 - 2¹⁹ = 618474766337 is a prime.

It is a super-2 number, since 2×618475290625² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98952922 + ... + 98959171.

It is an arithmetic number, because the mean of its divisors is an integer number (64420386597).

It is a Proth number, since it is equal to 9 ⋅ 2³⁶ + 1 and 9 < 2³⁶.

Almost surely, 2^618475290625 is an apocalyptic number.

It is an amenable number.

618475290625 is a deficient number, since it is larger than the sum of its proper divisors (154569348539).

618475290625 is an frugal number, since it uses more digits than its factorization.

618475290625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197912118 (or 197912098 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 618475290625 in words is "six hundred eighteen billion, four hundred seventy-five million, two hundred ninety thousand, six hundred twenty-five".