55783105487 has 4 divisors (see below), whose sum is σ = 56063422800. Its totient is φ = 55502788176.

The previous prime is 55783105481. The next prime is 55783105507. The reversal of 55783105487 is 78450138755.

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 55783105487 - 2⁴ = 55783105471 is a prime.

It is a super-2 number, since 2×55783105487² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55783105481) 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, 140158358 + ... + 140158755.

It is an arithmetic number, because the mean of its divisors is an integer number (14015855700).

Almost surely, 2^55783105487 is an apocalyptic number.

55783105487 is a deficient number, since it is larger than the sum of its proper divisors (280317313).

55783105487 is a wasteful number, since it uses less digits than its factorization.

55783105487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280317312.

The product of its (nonzero) digits is 4704000, while the sum is 53.

The spelling of 55783105487 in words is "fifty-five billion, seven hundred eighty-three million, one hundred five thousand, four hundred eighty-seven".