1078555554 has 16 divisors (see below), whose sum is σ = 2396790240. Its totient is φ = 359518500.

The previous prime is 1078555451. The next prime is 1078555573. The reversal of 1078555554 is 4555558701.

1078555554 is a `hidden beast` number, since 10 + 7 + 85 + 5 + 5 + 554 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9986572 + ... + 9986679.

It is an arithmetic number, because the mean of its divisors is an integer number (149799390).

Almost surely, 2^1078555554 is an apocalyptic number.

1078555554 is an abundant number, since it is smaller than the sum of its proper divisors (1318234686).

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

1078555554 is a wasteful number, since it uses less digits than its factorization.

1078555554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19973262 (or 19973256 counting only the distinct ones).

The product of its (nonzero) digits is 700000, while the sum is 45.

The square root of 1078555554 is about 32841.3695512230. The cubic root of 1078555554 is about 1025.5279624712.

The spelling of 1078555554 in words is "one billion, seventy-eight million, five hundred fifty-five thousand, five hundred fifty-four".