53404818431 has 4 divisors (see below), whose sum is σ = 53431562952. Its totient is φ = 53378073912.

The previous prime is 53404818349. The next prime is 53404818433. The reversal of 53404818431 is 13481840435.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53404818431 is a prime.

It is a super-2 number, since 2×53404818431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53404818433) 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, 13369265 + ... + 13373258.

It is an arithmetic number, because the mean of its divisors is an integer number (13357890738).

Almost surely, 2^53404818431 is an apocalyptic number.

53404818431 is a deficient number, since it is larger than the sum of its proper divisors (26744521).

53404818431 is a wasteful number, since it uses less digits than its factorization.

53404818431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26744520.

The product of its (nonzero) digits is 184320, while the sum is 41.

The spelling of 53404818431 in words is "fifty-three billion, four hundred four million, eight hundred eighteen thousand, four hundred thirty-one".