55667778000 has 160 divisors (see below), whose sum is σ = 179616932352. Its totient is φ = 14832832000.

The previous prime is 55667777993. The next prime is 55667778013. The reversal of 55667778000 is 87776655.

55667778000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9495070 + ... + 9500930.

Almost surely, 2^55667778000 is an apocalyptic number.

55667778000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55667778000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89808466176).

55667778000 is an abundant number, since it is smaller than the sum of its proper divisors (123949154352).

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

55667778000 is a wasteful number, since it uses less digits than its factorization.

55667778000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7470 (or 7454 counting only the distinct ones).

The product of its (nonzero) digits is 2469600, while the sum is 51.

The spelling of 55667778000 in words is "fifty-five billion, six hundred sixty-seven million, seven hundred seventy-eight thousand".