55161523280 has 20 divisors (see below), whose sum is σ = 128250541812. Its totient is φ = 22064609280.

The previous prime is 55161523271. The next prime is 55161523321. The reversal of 55161523280 is 8232516155.

It can be written as a sum of positive squares in 2 ways, for example, as 37306149904 + 17855373376 = 193148^2 + 133624^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 344759441 + ... + 344759600.

Almost surely, 2^55161523280 is an apocalyptic number.

It is an amenable number.

55161523280 is an abundant number, since it is smaller than the sum of its proper divisors (73089018532).

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

55161523280 is a wasteful number, since it uses less digits than its factorization.

55161523280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689519054 (or 689519048 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 38.

The spelling of 55161523280 in words is "fifty-five billion, one hundred sixty-one million, five hundred twenty-three thousand, two hundred eighty".