55077078778 has 8 divisors (see below), whose sum is σ = 83387727072. Its totient is φ = 27281169756.

The previous prime is 55077078767. The next prime is 55077078787. The reversal of 55077078778 is 87787077055.

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

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, 128684550 + ... + 128684977.

It is an arithmetic number, because the mean of its divisors is an integer number (10423465884).

Almost surely, 2^55077078778 is an apocalyptic number.

55077078778 is a deficient number, since it is larger than the sum of its proper divisors (28310648294).

55077078778 is a wasteful number, since it uses less digits than its factorization.

55077078778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257369636.

The product of its (nonzero) digits is 26891200, while the sum is 61.

The spelling of 55077078778 in words is "fifty-five billion, seventy-seven million, seventy-eight thousand, seven hundred seventy-eight".