53015544551 has 4 divisors (see below), whose sum is σ = 53017197600. Its totient is φ = 53013891504.

The previous prime is 53015544539. The next prime is 53015544557. The reversal of 53015544551 is 15544551035.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53015544551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53015544557) 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, 777446 + ... + 842883.

It is an arithmetic number, because the mean of its divisors is an integer number (13254299400).

Almost surely, 2^53015544551 is an apocalyptic number.

53015544551 is a deficient number, since it is larger than the sum of its proper divisors (1653049).

53015544551 is a wasteful number, since it uses less digits than its factorization.

53015544551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653048.

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 53015544551 in words is "fifty-three billion, fifteen million, five hundred forty-four thousand, five hundred fifty-one".