55516761 has 24 divisors (see below), whose sum is σ = 82784520. Its totient is φ = 35824896.

The previous prime is 55516757. The next prime is 55516763. The reversal of 55516761 is 16761555.

It can be written as a sum of positive squares in 4 ways, for example, as 23707161 + 31809600 = 4869^2 + 5640^2 .

It is not a de Polignac number, because 55516761 - 2² = 55516757 is a prime.

It is a super-2 number, since 2×55516761² = 6164221503862242, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55516763) 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, 97285 + ... + 97853.

It is an arithmetic number, because the mean of its divisors is an integer number (3449355).

Almost surely, 2^55516761 is an apocalyptic number.

It is an amenable number.

55516761 is a deficient number, since it is larger than the sum of its proper divisors (27267759).

55516761 is a wasteful number, since it uses less digits than its factorization.

55516761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905 (or 902 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 55516761 is about 7450.9570526208. The cubic root of 55516761 is about 381.4825761421.

The spelling of 55516761 in words is "fifty-five million, five hundred sixteen thousand, seven hundred sixty-one".