616542601251 has 8 divisors (see below), whose sum is σ = 822158410320. Its totient is φ = 410977596512.

The previous prime is 616542601249. The next prime is 616542601319. The reversal of 616542601251 is 152106245616.

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 616542601251 - 2¹ = 616542601249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (616542601211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12672756 + ... + 12721313.

It is an arithmetic number, because the mean of its divisors is an integer number (102769801290).

Almost surely, 2^616542601251 is an apocalyptic number.

616542601251 is a deficient number, since it is larger than the sum of its proper divisors (205615809069).

616542601251 is a wasteful number, since it uses less digits than its factorization.

616542601251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25402165.

The product of its (nonzero) digits is 86400, while the sum is 39.

Adding to 616542601251 its reverse (152106245616), we get a palindrome (768648846867).

The spelling of 616542601251 in words is "six hundred sixteen billion, five hundred forty-two million, six hundred one thousand, two hundred fifty-one".