616161272 has 8 divisors (see below), whose sum is σ = 1155302400. Its totient is φ = 308080632.

The previous prime is 616161263. The next prime is 616161313. The reversal of 616161272 is 272161616.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×616161272² = 759309426225315968, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38510072 + ... + 38510087.

It is an arithmetic number, because the mean of its divisors is an integer number (144412800).

Almost surely, 2^616161272 is an apocalyptic number.

It is an amenable number.

616161272 is a deficient number, since it is larger than the sum of its proper divisors (539141128).

616161272 is a wasteful number, since it uses less digits than its factorization.

616161272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77020165 (or 77020161 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The square root of 616161272 is about 24822.5959963901. The cubic root of 616161272 is about 850.9384200975.

The spelling of 616161272 in words is "six hundred sixteen million, one hundred sixty-one thousand, two hundred seventy-two".