615506220050 has 18 divisors (see below), whose sum is σ = 1144851887829. Its totient is φ = 246200269000.

The previous prime is 615506220019. The next prime is 615506220059. The reversal of 615506220050 is 50022605516.

It can be written as a sum of positive squares in 2 ways, for example, as 603196095649 + 12310124401 = 776657^2 + 110951^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=554755.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 615506219989 and 615506220016.

It is not an unprimeable number, because it can be changed into a prime (615506220059) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5492075 + ... + 5603025.

Almost surely, 2^615506220050 is an apocalyptic number.

615506220050 is a deficient number, since it is larger than the sum of its proper divisors (529345667779).

615506220050 is an frugal number, since it uses more digits than its factorization.

615506220050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221914 (or 110958 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

Multiplying 615506220050 by its sum of digits (32), we get a square (19696199041600 = 4438040²).

Adding to 615506220050 its reverse (50022605516), we get a palindrome (665528825566).

The spelling of 615506220050 in words is "six hundred fifteen billion, five hundred six million, two hundred twenty thousand, fifty".