53020891505 has 4 divisors (see below), whose sum is σ = 63625069812. Its totient is φ = 42416713200.

The previous prime is 53020891501. The next prime is 53020891531. The reversal of 53020891505 is 50519802035.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31423943824 + 21596947681 = 177268^2 + 146959^2 .

It is not a de Polignac number, because 53020891505 - 2² = 53020891501 is a prime.

It is a super-2 number, since 2×53020891505² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53020891501) 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, 5302089146 + ... + 5302089155.

It is an arithmetic number, because the mean of its divisors is an integer number (15906267453).

Almost surely, 2^53020891505 is an apocalyptic number.

It is an amenable number.

53020891505 is a deficient number, since it is larger than the sum of its proper divisors (10604178307).

53020891505 is a wasteful number, since it uses less digits than its factorization.

53020891505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10604178306.

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 53020891505 in words is "fifty-three billion, twenty million, eight hundred ninety-one thousand, five hundred five".