53689921465 has 8 divisors (see below), whose sum is σ = 65092111560. Its totient is φ = 42509133312.

The previous prime is 53689921451. The next prime is 53689921477. The reversal of 53689921465 is 56412998635.

It can be written as a sum of positive squares in 4 ways, for example, as 6463677609 + 47226243856 = 80397^2 + 217316^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 53689921465 - 2⁵ = 53689921433 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55349950 + ... + 55350919.

It is an arithmetic number, because the mean of its divisors is an integer number (8136513945).

Almost surely, 2^53689921465 is an apocalyptic number.

It is an amenable number.

53689921465 is a deficient number, since it is larger than the sum of its proper divisors (11402190095).

53689921465 is a wasteful number, since it uses less digits than its factorization.

53689921465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110700971.

The product of its digits is 13996800, while the sum is 58.

The spelling of 53689921465 in words is "fifty-three billion, six hundred eighty-nine million, nine hundred twenty-one thousand, four hundred sixty-five".