55358214911978 has 64 divisors (see below), whose sum is σ = 96246584467200. Its totient is φ = 23637519843840.

The previous prime is 55358214911977. The next prime is 55358214912001. The reversal of 55358214911978 is 87911941285355.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55358214911971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 934933238 + ... + 934992446.

It is an arithmetic number, because the mean of its divisors is an integer number (1503852882300).

Almost surely, 2^{55358214911978} is an apocalyptic number.

55358214911978 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

55358214911978 is a deficient number, since it is larger than the sum of its proper divisors (40888369555222).

55358214911978 is a wasteful number, since it uses less digits than its factorization.

55358214911978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98895.

The product of its digits is 108864000, while the sum is 68.

The spelling of 55358214911978 in words is "fifty-five trillion, three hundred fifty-eight billion, two hundred fourteen million, nine hundred eleven thousand, nine hundred seventy-eight".