55787478755 has 8 divisors (see below), whose sum is σ = 67004593872. Its totient is φ = 44590236768.

The previous prime is 55787478739. The next prime is 55787478763.

It is a happy number.

55787478755 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55787478755 - 2⁴ = 55787478739 is a prime.

It is a super-2 number, since 2×55787478755² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4962104 + ... + 4973333.

It is an arithmetic number, because the mean of its divisors is an integer number (8375574234).

Almost surely, 2^55787478755 is an apocalyptic number.

55787478755 is a deficient number, since it is larger than the sum of its proper divisors (11217115117).

55787478755 is a wasteful number, since it uses less digits than its factorization.

55787478755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9936565.

The product of its digits is 384160000, while the sum is 68.

The spelling of 55787478755 in words is "fifty-five billion, seven hundred eighty-seven million, four hundred seventy-eight thousand, seven hundred fifty-five".