616420335251 has 4 divisors (see below), whose sum is σ = 704480383152. Its totient is φ = 528360287352.

The previous prime is 616420335221. The next prime is 616420335277. The reversal of 616420335251 is 152533024616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 616420335251 - 2³⁸ = 341542428307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (616420335221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44030023940 + ... + 44030023953.

It is an arithmetic number, because the mean of its divisors is an integer number (176120095788).

Almost surely, 2^616420335251 is an apocalyptic number.

616420335251 is a deficient number, since it is larger than the sum of its proper divisors (88060047901).

616420335251 is an equidigital number, since it uses as much as digits as its factorization.

616420335251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88060047900.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 616420335251 its reverse (152533024616), we get a palindrome (768953359867).

The spelling of 616420335251 in words is "six hundred sixteen billion, four hundred twenty million, three hundred thirty-five thousand, two hundred fifty-one".