616706451 has 12 divisors (see below), whose sum is σ = 896134512. Its totient is φ = 408674736.

The previous prime is 616706371. The next prime is 616706477. The reversal of 616706451 is 154607616.

616706451 is a `hidden beast` number, since 6 + 1 + 6 + 7 + 0 + 645 + 1 = 666.

It is not a de Polignac number, because 616706451 - 2⁷ = 616706323 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (616706551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203656 + ... + 206661.

It is an arithmetic number, because the mean of its divisors is an integer number (74677876).

Almost surely, 2^616706451 is an apocalyptic number.

616706451 is a deficient number, since it is larger than the sum of its proper divisors (279428061).

616706451 is a wasteful number, since it uses less digits than its factorization.

616706451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410490 (or 410487 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 616706451 is about 24833.5750748860. The cubic root of 616706451 is about 851.1893159921.

It can be divided in two parts, 61670 and 6451, that added together give a square (68121 = 261²).

The spelling of 616706451 in words is "six hundred sixteen million, seven hundred six thousand, four hundred fifty-one".