623001440641 has 2 divisors, whose sum is σ = 623001440642. Its totient is φ = 623001440640.

The previous prime is 623001440597. The next prime is 623001440669. The reversal of 623001440641 is 146044100326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397372640625 + 225628800016 = 630375^2 + 475004^2 .

It is a cyclic number.

It is not a de Polignac number, because 623001440641 - 2⁷ = 623001440513 is a prime.

It is a super-2 number, since 2×623001440641² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (623001440041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311500720320 + 311500720321.

It is an arithmetic number, because the mean of its divisors is an integer number (311500720321).

Almost surely, 2^623001440641 is an apocalyptic number.

It is an amenable number.

623001440641 is a deficient number, since it is larger than the sum of its proper divisors (1).

623001440641 is an equidigital number, since it uses as much as digits as its factorization.

623001440641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 623001440641 its reverse (146044100326), we get a palindrome (769045540967).

The spelling of 623001440641 in words is "six hundred twenty-three billion, one million, four hundred forty thousand, six hundred forty-one".