53404223665 has 16 divisors (see below), whose sum is σ = 69070050000. Its totient is φ = 39405330432.

The previous prime is 53404223651. The next prime is 53404223669. The reversal of 53404223665 is 56632240435.

53404223665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 22267503729 + 31136719936 = 149223^2 + 176456^2 .

It is not a de Polignac number, because 53404223665 - 2¹⁵ = 53404190897 is a prime.

It is a super-2 number, since 2×53404223665² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53404223669) 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, 247720 + ... + 410089.

It is an arithmetic number, because the mean of its divisors is an integer number (4316878125).

Almost surely, 2^53404223665 is an apocalyptic number.

It is an amenable number.

53404223665 is a deficient number, since it is larger than the sum of its proper divisors (15665826335).

53404223665 is a wasteful number, since it uses less digits than its factorization.

53404223665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659076.

The product of its (nonzero) digits is 518400, while the sum is 40.

The spelling of 53404223665 in words is "fifty-three billion, four hundred four million, two hundred twenty-three thousand, six hundred sixty-five".