55705213563 has 24 divisors (see below), whose sum is σ = 76785560064. Its totient is φ = 35920714320.

The previous prime is 55705213547. The next prime is 55705213579. The reversal of 55705213563 is 36531250755.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55705213547) and next prime (55705213579).

It is not a de Polignac number, because 55705213563 - 2⁴ = 55705213547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55705213163) 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 23 ways as a sum of consecutive naturals, for example, 7973770 + ... + 7980752.

It is an arithmetic number, because the mean of its divisors is an integer number (3199398336).

Almost surely, 2^55705213563 is an apocalyptic number.

55705213563 is a deficient number, since it is larger than the sum of its proper divisors (21080346501).

55705213563 is a wasteful number, since it uses less digits than its factorization.

55705213563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9815 (or 9784 counting only the distinct ones).

The product of its (nonzero) digits is 472500, while the sum is 42.

The spelling of 55705213563 in words is "fifty-five billion, seven hundred five million, two hundred thirteen thousand, five hundred sixty-three".