53345717505 has 20 divisors (see below), whose sum is σ = 95627138772. Its totient is φ = 28451049120.

The previous prime is 53345717473. The next prime is 53345717519. The reversal of 53345717505 is 50571754335.

53345717505 is a `hidden beast` number, since 5 + 3 + 3 + 4 + 571 + 75 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20715269184 + 32630448321 = 143928^2 + 180639^2 .

It is not a de Polignac number, because 53345717505 - 2⁵ = 53345717473 is a prime.

It is a super-2 number, since 2×53345717505² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 65858506 + ... + 65859315.

Almost surely, 2^53345717505 is an apocalyptic number.

It is an amenable number.

53345717505 is a deficient number, since it is larger than the sum of its proper divisors (42281421267).

53345717505 is a wasteful number, since it uses less digits than its factorization.

53345717505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131717838 (or 131717829 counting only the distinct ones).

The product of its (nonzero) digits is 1102500, while the sum is 45.

The spelling of 53345717505 in words is "fifty-three billion, three hundred forty-five million, seven hundred seventeen thousand, five hundred five".