623211266340 has 72 divisors (see below), whose sum is σ = 2035823477688. Its totient is φ = 153405849600.

The previous prime is 623211266333. The next prime is 623211266389. The reversal of 623211266340 is 43662112326.

623211266340 is a `hidden beast` number, since 6 + 2 + 3 + 2 + 1 + 12 + 6 + 634 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 652393764 + 622558872576 = 25542^2 + 789024^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 623211266295 and 623211266304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133162461 + ... + 133167140.

It is an arithmetic number, because the mean of its divisors is an integer number (28275326079).

Almost surely, 2^623211266340 is an apocalyptic number.

623211266340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

623211266340 is an abundant number, since it is smaller than the sum of its proper divisors (1412612211348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

623211266340 is a wasteful number, since it uses less digits than its factorization.

623211266340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266329629 (or 266329624 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

Adding to 623211266340 its reverse (43662112326), we get a palindrome (666873378666).

The spelling of 623211266340 in words is "six hundred twenty-three billion, two hundred eleven million, two hundred sixty-six thousand, three hundred forty".