53010065781 has 12 divisors (see below), whose sum is σ = 76611263820. Its totient is φ = 35321042880.

The previous prime is 53010065749. The next prime is 53010065807. The reversal of 53010065781 is 18756001035.

It can be written as a sum of positive squares in 2 ways, for example, as 5993082225 + 47016983556 = 77415^2 + 216834^2 .

It is not a de Polignac number, because 53010065781 - 2⁵ = 53010065749 is a prime.

It is a super-2 number, since 2×53010065781² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53010065081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1565736 + ... + 1599233.

It is an arithmetic number, because the mean of its divisors is an integer number (6384271985).

Almost surely, 2^53010065781 is an apocalyptic number.

It is an amenable number.

53010065781 is a deficient number, since it is larger than the sum of its proper divisors (23601198039).

53010065781 is a wasteful number, since it uses less digits than its factorization.

53010065781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3166836 (or 3166833 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 53010065781 in words is "fifty-three billion, ten million, sixty-five thousand, seven hundred eighty-one".