53021658487 has 12 divisors (see below), whose sum is σ = 62047596240. Its totient is φ = 45174990336.

The previous prime is 53021658439. The next prime is 53021658539. The reversal of 53021658487 is 78485612035.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-53021658487 is a prime.

It is a super-2 number, since 2×53021658487² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 53021658487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53021658187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3231562 + ... + 3247927.

It is an arithmetic number, because the mean of its divisors is an integer number (5170633020).

Almost surely, 2^53021658487 is an apocalyptic number.

53021658487 is a deficient number, since it is larger than the sum of its proper divisors (9025937753).

53021658487 is a wasteful number, since it uses less digits than its factorization.

53021658487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6479670 (or 6479663 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 53021658487 in words is "fifty-three billion, twenty-one million, six hundred fifty-eight thousand, four hundred eighty-seven".