53570021557 has 8 divisors (see below), whose sum is σ = 58044725984. Its totient is φ = 49145879088.

The previous prime is 53570021539. The next prime is 53570021569. The reversal of 53570021557 is 75512007535.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53570021557 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 (53570021507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12638283 + ... + 12642520.

It is an arithmetic number, because the mean of its divisors is an integer number (7255590748).

Almost surely, 2^53570021557 is an apocalyptic number.

It is an amenable number.

53570021557 is a deficient number, since it is larger than the sum of its proper divisors (4474704427).

53570021557 is a wasteful number, since it uses less digits than its factorization.

53570021557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25280979.

The product of its (nonzero) digits is 183750, while the sum is 40.

The spelling of 53570021557 in words is "fifty-three billion, five hundred seventy million, twenty-one thousand, five hundred fifty-seven".