55405790078 has 8 divisors (see below), whose sum is σ = 85041445368. Its totient is φ = 27058641624.

The previous prime is 55405790029. The next prime is 55405790147. The reversal of 55405790078 is 87009750455.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322126601 + ... + 322126772.

It is an arithmetic number, because the mean of its divisors is an integer number (10630180671).

Almost surely, 2^55405790078 is an apocalyptic number.

55405790078 is a deficient number, since it is larger than the sum of its proper divisors (29635655290).

55405790078 is a wasteful number, since it uses less digits than its factorization.

55405790078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644253418.

The product of its (nonzero) digits is 1764000, while the sum is 50.

The spelling of 55405790078 in words is "fifty-five billion, four hundred five million, seven hundred ninety thousand, seventy-eight".