53442920178 has 90 divisors (see below), whose sum is σ = 123021440157. Its totient is φ = 17340579360.

The previous prime is 53442920173. The next prime is 53442920189. The reversal of 53442920178 is 87102924435.

53442920178 is a `hidden beast` number, since 5 + 34 + 429 + 20 + 178 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38166701769 + 15276218409 = 195363^2 + 123597^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=163467.

It is a super-2 number, since 2×53442920178² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53442920173) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 120638425 + ... + 120638867.

Almost surely, 2^53442920178 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53442920178

53442920178 is an abundant number, since it is smaller than the sum of its proper divisors (69578519979).

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

53442920178 is an frugal number, since it uses more digits than its factorization.

53442920178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 53442920178 in words is "fifty-three billion, four hundred forty-two million, nine hundred twenty thousand, one hundred seventy-eight".