53660513987 has 4 divisors (see below), whose sum is σ = 53667298080. Its totient is φ = 53653729896.

The previous prime is 53660513953. The next prime is 53660513993. The reversal of 53660513987 is 78931506635.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53660513987 - 2²⁰ = 53659465411 is a prime.

It is a super-2 number, since 2×53660513987² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53660512987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3380168 + ... + 3396005.

It is an arithmetic number, because the mean of its divisors is an integer number (13416824520).

Almost surely, 2^53660513987 is an apocalyptic number.

53660513987 is a deficient number, since it is larger than the sum of its proper divisors (6784093).

53660513987 is an equidigital number, since it uses as much as digits as its factorization.

53660513987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6784092.

The product of its (nonzero) digits is 4082400, while the sum is 53.

The spelling of 53660513987 in words is "fifty-three billion, six hundred sixty million, five hundred thirteen thousand, nine hundred eighty-seven".