625066645361 has 4 divisors (see below), whose sum is σ = 626266389924. Its totient is φ = 623866900800.

The previous prime is 625066645351. The next prime is 625066645421. The reversal of 625066645361 is 163546660526.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 163546660526 = 2 ⋅81773330263.

It can be written as a sum of positive squares in 2 ways, for example, as 456494814736 + 168571830625 = 675644^2 + 410575^2 .

It is a cyclic number.

It is not a de Polignac number, because 625066645361 - 2¹⁰ = 625066644337 is a prime.

It is a super-2 number, since 2×625066645361² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (625066645331) 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, 599871500 + ... + 599872541.

It is an arithmetic number, because the mean of its divisors is an integer number (156566597481).

Almost surely, 2^625066645361 is an apocalyptic number.

It is an amenable number.

625066645361 is a deficient number, since it is larger than the sum of its proper divisors (1199744563).

625066645361 is a wasteful number, since it uses less digits than its factorization.

625066645361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199744562.

The product of its (nonzero) digits is 4665600, while the sum is 50.

The spelling of 625066645361 in words is "six hundred twenty-five billion, sixty-six million, six hundred forty-five thousand, three hundred sixty-one".