53020477613 has 4 divisors (see below), whose sum is σ = 53207829408. Its totient is φ = 52833125820.

The previous prime is 53020477571. The next prime is 53020477619. The reversal of 53020477613 is 31677402035.

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-53020477613 is a prime.

It is a super-2 number, since 2×53020477613² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53020477619) 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, 93675473 + ... + 93676038.

It is an arithmetic number, because the mean of its divisors is an integer number (13301957352).

Almost surely, 2^53020477613 is an apocalyptic number.

It is an amenable number.

53020477613 is a deficient number, since it is larger than the sum of its proper divisors (187351795).

53020477613 is a wasteful number, since it uses less digits than its factorization.

53020477613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187351794.

The product of its (nonzero) digits is 105840, while the sum is 38.

Adding to 53020477613 its reverse (31677402035), we get a palindrome (84697879648).

The spelling of 53020477613 in words is "fifty-three billion, twenty million, four hundred seventy-seven thousand, six hundred thirteen".