53291386985 has 8 divisors (see below), whose sum is σ = 63952029576. Its totient is φ = 42631532800.

The previous prime is 53291386937. The next prime is 53291386991. The reversal of 53291386985 is 58968319235.

It can be written as a sum of positive squares in 4 ways, for example, as 2307553369 + 50983833616 = 48037^2 + 225796^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53291386985 - 2²² = 53287192681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36494 + ... + 328503.

It is an arithmetic number, because the mean of its divisors is an integer number (7994003697).

Almost surely, 2^53291386985 is an apocalyptic number.

It is an amenable number.

53291386985 is a deficient number, since it is larger than the sum of its proper divisors (10660642591).

53291386985 is a wasteful number, since it uses less digits than its factorization.

53291386985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394203.

The product of its digits is 13996800, while the sum is 59.

The spelling of 53291386985 in words is "fifty-three billion, two hundred ninety-one million, three hundred eighty-six thousand, nine hundred eighty-five".