55454021261 has 4 divisors (see below), whose sum is σ = 55631190972. Its totient is φ = 55276851552.

The previous prime is 55454021239. The next prime is 55454021279. The reversal of 55454021261 is 16212045455.

55454021261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7073819236 + 48380202025 = 84106^2 + 219955^2 .

It is a cyclic number.

It is not a de Polignac number, because 55454021261 - 2²⁶ = 55386912397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55454021201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88584386 + ... + 88585011.

It is an arithmetic number, because the mean of its divisors is an integer number (13907797743).

Almost surely, 2^55454021261 is an apocalyptic number.

It is an amenable number.

55454021261 is a deficient number, since it is larger than the sum of its proper divisors (177169711).

55454021261 is a wasteful number, since it uses less digits than its factorization.

55454021261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177169710.

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 55454021261 in words is "fifty-five billion, four hundred fifty-four million, twenty-one thousand, two hundred sixty-one".