616926245 has 16 divisors (see below), whose sum is σ = 810333552. Its totient is φ = 448104960.

The previous prime is 616926241. The next prime is 616926259. The reversal of 616926245 is 542629616.

It is a happy number.

It is a Cunningham number, because it is equal to 24838²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 284192164 + 332734081 = 16858^2 + 18241^2 .

It is not a de Polignac number, because 616926245 - 2² = 616926241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616926241) 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, 73832 + ... + 81761.

It is an arithmetic number, because the mean of its divisors is an integer number (50645847).

Almost surely, 2^616926245 is an apocalyptic number.

616926245 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

616926245 is a deficient number, since it is larger than the sum of its proper divisors (193407307).

616926245 is a wasteful number, since it uses less digits than its factorization.

616926245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155672.

The product of its digits is 155520, while the sum is 41.

The square root of 616926245 is about 24838.0000201304. Note that the first 4 decimals coincide. The cubic root of 616926245 is about 851.2904251896.

The spelling of 616926245 in words is "six hundred sixteen million, nine hundred twenty-six thousand, two hundred forty-five".