55778444001 has 96 divisors (see below), whose sum is σ = 97853184000. Its totient is φ = 29908237824.

The previous prime is 55778443993. The next prime is 55778444011. The reversal of 55778444001 is 10044487755.

It is not a de Polignac number, because 55778444001 - 2³ = 55778443993 is a prime.

It is a super-2 number, since 2×55778444001² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55778444011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 94061161 + ... + 94061753.

It is an arithmetic number, because the mean of its divisors is an integer number (1019304000).

Almost surely, 2^55778444001 is an apocalyptic number.

It is an amenable number.

55778444001 is a deficient number, since it is larger than the sum of its proper divisors (42074739999).

55778444001 is a wasteful number, since it uses less digits than its factorization.

55778444001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243 (or 1240 counting only the distinct ones).

The product of its (nonzero) digits is 627200, while the sum is 45.

The spelling of 55778444001 in words is "fifty-five billion, seven hundred seventy-eight million, four hundred forty-four thousand, one".