1616506461 has 6 divisors (see below), whose sum is σ = 2334953790. Its totient is φ = 1077670968.

The previous prime is 1616506457. The next prime is 1616506469. The reversal of 1616506461 is 1646056161.

It is a happy number.

1616506461 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 5 + 0 + 646 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1353872025 + 262634436 = 36795^2 + 16206^2 .

It is not a de Polignac number, because 1616506461 - 2² = 1616506457 is a prime.

It is a super-2 number, since 2×1616506461² = 5226186276909489042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616506469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89805906 + ... + 89805923.

It is an arithmetic number, because the mean of its divisors is an integer number (389158965).

Almost surely, 2^1616506461 is an apocalyptic number.

It is an amenable number.

1616506461 is a deficient number, since it is larger than the sum of its proper divisors (718447329).

1616506461 is a wasteful number, since it uses less digits than its factorization.

1616506461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179611835 (or 179611832 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1616506461 is about 40205.8013351307. The cubic root of 1616506461 is about 1173.6154413690.

The spelling of 1616506461 in words is "one billion, six hundred sixteen million, five hundred six thousand, four hundred sixty-one".