623318145025 has 9 divisors (see below), whose sum is σ = 772919394793. Its totient is φ = 498651358000.

The previous prime is 623318145019. The next prime is 623318145127. The reversal of 623318145025 is 520541813326.

The square root of 623318145025 is 789505.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 74734984129 + 548583160896 = 273377^2 + 740664^2 .

It is not a de Polignac number, because 623318145025 - 2³ = 623318145017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3868575 + ... + 4026475.

Almost surely, 2^623318145025 is an apocalyptic number.

623318145025 is the 789505-th square number.

623318145025 is the 394753-rd centered octagonal number.

It is an amenable number.

623318145025 is a deficient number, since it is larger than the sum of its proper divisors (149601249768).

623318145025 is an frugal number, since it uses more digits than its factorization.

623318145025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315812 (or 157906 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 623318145025 in words is "six hundred twenty-three billion, three hundred eighteen million, one hundred forty-five thousand, twenty-five".