623448342553 has 2 divisors, whose sum is σ = 623448342554. Its totient is φ = 623448342552.

The previous prime is 623448342523. The next prime is 623448342557. The reversal of 623448342553 is 355243844326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 608512325184 + 14936017369 = 780072^2 + 122213^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623448342553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 623448342497 and 623448342506.

It is not a weakly prime, because it can be changed into another prime (623448342557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311724171276 + 311724171277.

It is an arithmetic number, because the mean of its divisors is an integer number (311724171277).

Almost surely, 2^623448342553 is an apocalyptic number.

It is an amenable number.

623448342553 is a deficient number, since it is larger than the sum of its proper divisors (1).

623448342553 is an equidigital number, since it uses as much as digits as its factorization.

623448342553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8294400, while the sum is 49.

The spelling of 623448342553 in words is "six hundred twenty-three billion, four hundred forty-eight million, three hundred forty-two thousand, five hundred fifty-three".