628324143561 has 27 divisors (see below), whose sum is σ = 913745141127. Its totient is φ = 416056104720.

The previous prime is 628324143547. The next prime is 628324143569. The reversal of 628324143561 is 165341423826.

The square root of 628324143561 is 792669.

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

628324143561 is a `hidden beast` number, since 6 + 2 + 8 + 3 + 2 + 41 + 43 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 482842927161 + 145481216400 = 694869^2 + 381420^2 .

It is not a de Polignac number, because 628324143561 - 2²³ = 628315754953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (628324143569) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 387614331 + ... + 387615951.

Almost surely, 2^628324143561 is an apocalyptic number.

628324143561 is the 792669-th square number.

628324143561 is the 396335-th centered octagonal number.

It is an amenable number.

628324143561 is a deficient number, since it is larger than the sum of its proper divisors (285420997566).

628324143561 is an frugal number, since it uses more digits than its factorization.

628324143561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3574 (or 1787 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The spelling of 628324143561 in words is "six hundred twenty-eight billion, three hundred twenty-four million, one hundred forty-three thousand, five hundred sixty-one".