632978256769 has 4 divisors (see below), whose sum is σ = 633076842580. Its totient is φ = 632879670960.

The previous prime is 632978256721. The next prime is 632978256797. The reversal of 632978256769 is 967652879236.

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 198154071025 + 434824185744 = 445145^2 + 659412^2 .

It is a cyclic number.

It is not a de Polignac number, because 632978256769 - 2¹³ = 632978248577 is a prime.

It is a super-2 number, since 2×632978256769² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 632978256698 and 632978256707.

It is not an unprimeable number, because it can be changed into a prime (632978253769) 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, 49283274 + ... + 49296115.

It is an arithmetic number, because the mean of its divisors is an integer number (158269210645).

Almost surely, 2^632978256769 is an apocalyptic number.

It is an amenable number.

632978256769 is a deficient number, since it is larger than the sum of its proper divisors (98585811).

632978256769 is an equidigital number, since it uses as much as digits as its factorization.

632978256769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98585810.

The product of its digits is 411505920, while the sum is 70.

The spelling of 632978256769 in words is "six hundred thirty-two billion, nine hundred seventy-eight million, two hundred fifty-six thousand, seven hundred sixty-nine".