516547661 has 24 divisors (see below), whose sum is σ = 635107680. Its totient is φ = 417729312.

The previous prime is 516547657. The next prime is 516547663. The reversal of 516547661 is 166745615.

It is not a de Polignac number, because 516547661 - 2² = 516547657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516547663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 256886 + ... + 258888.

It is an arithmetic number, because the mean of its divisors is an integer number (26462820).

Almost surely, 2^516547661 is an apocalyptic number.

It is an amenable number.

516547661 is a deficient number, since it is larger than the sum of its proper divisors (118560019).

516547661 is a wasteful number, since it uses less digits than its factorization.

516547661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313 (or 2306 counting only the distinct ones).

The product of its digits is 151200, while the sum is 41.

The square root of 516547661 is about 22727.6849018988. The cubic root of 516547661 is about 802.3615951630.

The spelling of 516547661 in words is "five hundred sixteen million, five hundred forty-seven thousand, six hundred sixty-one".