616425976385 has 8 divisors (see below), whose sum is σ = 739727413416. Its totient is φ = 493129953280.

The previous prime is 616425976363. The next prime is 616425976391. The reversal of 616425976385 is 583679524616.

616425976385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 785128²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 221912597776 + 394513378609 = 471076^2 + 628103^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 616425976385 - 2¹² = 616425972289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1098626 + ... + 1561995.

It is an arithmetic number, because the mean of its divisors is an integer number (92465926677).

Almost surely, 2^616425976385 is an apocalyptic number.

It is an amenable number.

616425976385 is a deficient number, since it is larger than the sum of its proper divisors (123301437031).

616425976385 is a wasteful number, since it uses less digits than its factorization.

616425976385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706963.

The product of its digits is 65318400, while the sum is 62.

The spelling of 616425976385 in words is "six hundred sixteen billion, four hundred twenty-five million, nine hundred seventy-six thousand, three hundred eighty-five".