53806145881 has 4 divisors (see below), whose sum is σ = 56145543552. Its totient is φ = 51466748212.

The previous prime is 53806145873. The next prime is 53806145891. The reversal of 53806145881 is 18854160835.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18854160835 = 5 ⋅3770832167.

It is a cyclic number.

It is not a de Polignac number, because 53806145881 - 2³ = 53806145873 is a prime.

It is a super-2 number, since 2×53806145881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53806145891) 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, 1169698801 + ... + 1169698846.

It is an arithmetic number, because the mean of its divisors is an integer number (14036385888).

Almost surely, 2^53806145881 is an apocalyptic number.

It is an amenable number.

53806145881 is a deficient number, since it is larger than the sum of its proper divisors (2339397671).

53806145881 is a wasteful number, since it uses less digits than its factorization.

53806145881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339397670.

The product of its (nonzero) digits is 921600, while the sum is 49.

The spelling of 53806145881 in words is "fifty-three billion, eight hundred six million, one hundred forty-five thousand, eight hundred eighty-one".