53720053551 has 8 divisors (see below), whose sum is σ = 79585264560. Its totient is φ = 35813369016.

The previous prime is 53720053547. The next prime is 53720053591. The reversal of 53720053551 is 15535002735.

53720053551 is a `hidden beast` number, since 5 + 3 + 72 + 0 + 0 + 535 + 51 = 666.

It is not a de Polignac number, because 53720053551 - 2² = 53720053547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53720053511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 994815780 + ... + 994815833.

It is an arithmetic number, because the mean of its divisors is an integer number (9948158070).

Almost surely, 2^53720053551 is an apocalyptic number.

53720053551 is a deficient number, since it is larger than the sum of its proper divisors (25865211009).

53720053551 is a wasteful number, since it uses less digits than its factorization.

53720053551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989631622 (or 1989631616 counting only the distinct ones).

The product of its (nonzero) digits is 78750, while the sum is 36.

The spelling of 53720053551 in words is "fifty-three billion, seven hundred twenty million, fifty-three thousand, five hundred fifty-one".