53020077481 has 4 divisors (see below), whose sum is σ = 60594374272. Its totient is φ = 45445780692.

The previous prime is 53020077469. The next prime is 53020077499. The reversal of 53020077481 is 18477002035.

53020077481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53020077481 is a prime.

It is a super-2 number, since 2×53020077481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53020077481.

It is not an unprimeable number, because it can be changed into a prime (53020077401) 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, 3787148385 + ... + 3787148398.

It is an arithmetic number, because the mean of its divisors is an integer number (15148593568).

Almost surely, 2^53020077481 is an apocalyptic number.

It is an amenable number.

53020077481 is a deficient number, since it is larger than the sum of its proper divisors (7574296791).

53020077481 is an equidigital number, since it uses as much as digits as its factorization.

53020077481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7574296790.

The product of its (nonzero) digits is 47040, while the sum is 37.

The spelling of 53020077481 in words is "fifty-three billion, twenty million, seventy-seven thousand, four hundred eighty-one".