53711921969 has 4 divisors (see below), whose sum is σ = 54447701796. Its totient is φ = 52976142144.

The previous prime is 53711921951. The next prime is 53711921983. The reversal of 53711921969 is 96912911735.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11394495025 + 42317426944 = 106745^2 + 205712^2 .

It is a cyclic number.

It is not a de Polignac number, because 53711921969 - 2⁸ = 53711921713 is a prime.

It is a super-2 number, since 2×53711921969² (a number of 22 digits) contains 22 as substring.

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 53711921969.

It is not an unprimeable number, because it can be changed into a prime (53711921869) 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 3 ways as a sum of consecutive naturals, for example, 367889804 + ... + 367889949.

It is an arithmetic number, because the mean of its divisors is an integer number (13611925449).

Almost surely, 2^53711921969 is an apocalyptic number.

It is an amenable number.

53711921969 is a deficient number, since it is larger than the sum of its proper divisors (735779827).

53711921969 is an equidigital number, since it uses as much as digits as its factorization.

53711921969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735779826.

The product of its digits is 918540, while the sum is 53.

The spelling of 53711921969 in words is "fifty-three billion, seven hundred eleven million, nine hundred twenty-one thousand, nine hundred sixty-nine".