53921405385 has 12 divisors (see below), whose sum is σ = 93463769412. Its totient is φ = 28758082848.

The previous prime is 53921405347. The next prime is 53921405431. The reversal of 53921405385 is 58350412935.

53921405385 is a `hidden beast` number, since 53 + 9 + 21 + 40 + 538 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21658420224 + 32262985161 = 147168^2 + 179619^2 .

It is not a de Polignac number, because 53921405385 - 2²² = 53917211081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1198253453 = 53921405385 / (5 + 3 + 9 + 2 + 1 + 4 + 0 + 5 + 3 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 53921405385.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 599126682 + ... + 599126771.

It is an arithmetic number, because the mean of its divisors is an integer number (7788647451).

Almost surely, 2^53921405385 is an apocalyptic number.

It is an amenable number.

53921405385 is a deficient number, since it is larger than the sum of its proper divisors (39542364027).

53921405385 is a wasteful number, since it uses less digits than its factorization.

53921405385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198253464 (or 1198253461 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 53921405385 in words is "fifty-three billion, nine hundred twenty-one million, four hundred five thousand, three hundred eighty-five".