75557061378 has 54 divisors (see below), whose sum is σ = 166358858211. Its totient is φ = 24784124904.

The previous prime is 75557061367. The next prime is 75557061383. The reversal of 75557061378 is 87316075557.

75557061378 is a `hidden beast` number, since 7 + 5 + 5 + 570 + 61 + 3 + 7 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 37778530689 + 37778530689 = 194367^2 + 194367^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=194367.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 78135051 + ... + 78136017.

Almost surely, 2^75557061378 is an apocalyptic number.

75557061378 is an abundant number, since it is smaller than the sum of its proper divisors (90801796833).

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

75557061378 is an frugal number, since it uses more digits than its factorization.

75557061378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076 (or 1039 counting only the distinct ones).

The product of its (nonzero) digits is 6174000, while the sum is 54.

The spelling of 75557061378 in words is "seventy-five billion, five hundred fifty-seven million, sixty-one thousand, three hundred seventy-eight".