53440521455 has 16 divisors (see below), whose sum is σ = 64373424960. Its totient is φ = 42589435392.

The previous prime is 53440521451. The next prime is 53440521461. The reversal of 53440521455 is 55412504435.

It is a cyclic number.

It is not a de Polignac number, because 53440521455 - 2² = 53440521451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53440521451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2071526 + ... + 2097164.

It is an arithmetic number, because the mean of its divisors is an integer number (4023339060).

Almost surely, 2^53440521455 is an apocalyptic number.

53440521455 is a deficient number, since it is larger than the sum of its proper divisors (10932903505).

53440521455 is a wasteful number, since it uses less digits than its factorization.

53440521455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27218.

The product of its (nonzero) digits is 240000, while the sum is 38.

The spelling of 53440521455 in words is "fifty-three billion, four hundred forty million, five hundred twenty-one thousand, four hundred fifty-five".