616643260513251 has 16 divisors (see below), whose sum is σ = 823970236216320. Its totient is φ = 410205903307200.

The previous prime is 616643260513129. The next prime is 616643260513261. The reversal of 616643260513251 is 152315062346616.

It is a happy number.

It is not a de Polignac number, because 616643260513251 - 2¹⁷ = 616643260382179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 616643260513194 and 616643260513203.

It is not an unprimeable number, because it can be changed into a prime (616643260513261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 393150226 + ... + 394715576.

It is an arithmetic number, because the mean of its divisors is an integer number (51498139763520).

Almost surely, 2^{616643260513251} is an apocalyptic number.

616643260513251 is a deficient number, since it is larger than the sum of its proper divisors (207326975703069).

616643260513251 is a wasteful number, since it uses less digits than its factorization.

616643260513251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849426.

The product of its (nonzero) digits is 4665600, while the sum is 51.

The spelling of 616643260513251 in words is "six hundred sixteen trillion, six hundred forty-three billion, two hundred sixty million, five hundred thirteen thousand, two hundred fifty-one".