623361977279 has 4 divisors (see below), whose sum is σ = 623363594784. Its totient is φ = 623360359776.

The previous prime is 623361977257. The next prime is 623361977297. The reversal of 623361977279 is 972779163326.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 972779163326 = 2 ⋅486389581663.

It is a cyclic number.

It is not a de Polignac number, because 623361977279 - 2¹⁶ = 623361911743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623361977239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141479 + ... + 1125495.

It is an arithmetic number, because the mean of its divisors is an integer number (155840898696).

Almost surely, 2^623361977279 is an apocalyptic number.

623361977279 is a deficient number, since it is larger than the sum of its proper divisors (1617505).

623361977279 is an equidigital number, since it uses as much as digits as its factorization.

623361977279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617504.

The product of its digits is 36006768, while the sum is 62.

The spelling of 623361977279 in words is "six hundred twenty-three billion, three hundred sixty-one million, nine hundred seventy-seven thousand, two hundred seventy-nine".