53406221761 has 4 divisors (see below), whose sum is σ = 53417053012. Its totient is φ = 53395390512.

The previous prime is 53406221753. The next prime is 53406221861. The reversal of 53406221761 is 16712260435.

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 26816027536 + 26590194225 = 163756^2 + 163065^2 .

It is a cyclic number.

It is not a de Polignac number, because 53406221761 - 2³ = 53406221753 is a prime.

It is a super-2 number, since 2×53406221761² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53406221761.

It is not an unprimeable number, because it can be changed into a prime (53406221731) 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, 5408226 + ... + 5418091.

It is an arithmetic number, because the mean of its divisors is an integer number (13354263253).

Almost surely, 2^53406221761 is an apocalyptic number.

It is an amenable number.

53406221761 is a deficient number, since it is larger than the sum of its proper divisors (10831251).

53406221761 is a wasteful number, since it uses less digits than its factorization.

53406221761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10831250.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 53406221761 in words is "fifty-three billion, four hundred six million, two hundred twenty-one thousand, seven hundred sixty-one".