55665610464 has 24 divisors (see below), whose sum is σ = 146122227720. Its totient is φ = 18555203456.

The previous prime is 55665610463. The next prime is 55665610471. The reversal of 55665610464 is 46401656655.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55665610463) 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, 289924959 + ... + 289925150.

It is an arithmetic number, because the mean of its divisors is an integer number (6088426155).

Almost surely, 2^55665610464 is an apocalyptic number.

It is an amenable number.

55665610464 is an abundant number, since it is smaller than the sum of its proper divisors (90456617256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55665610464 is a wasteful number, since it uses less digits than its factorization.

55665610464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579850122 (or 579850114 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 55665610464 in words is "fifty-five billion, six hundred sixty-five million, six hundred ten thousand, four hundred sixty-four".