653763912543 has 24 divisors (see below), whose sum is σ = 1079255091200. Its totient is φ = 373570456464.

The previous prime is 653763912541. The next prime is 653763912547. The reversal of 653763912543 is 345219367356.

653763912543 is a `hidden beast` number, since 6 + 5 + 3 + 7 + 6 + 3 + 91 + 2 + 543 = 666.

It is not a de Polignac number, because 653763912543 - 2¹ = 653763912541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 653763912543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653763912541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3264378 + ... + 3458856.

Almost surely, 2^653763912543 is an apocalyptic number.

653763912543 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

653763912543 is a deficient number, since it is larger than the sum of its proper divisors (425491178657).

653763912543 is a wasteful number, since it uses less digits than its factorization.

653763912543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247851 (or 247848 counting only the distinct ones).

The product of its digits is 12247200, while the sum is 54.

The spelling of 653763912543 in words is "six hundred fifty-three billion, seven hundred sixty-three million, nine hundred twelve thousand, five hundred forty-three".