202864664025 has 45 divisors (see below), whose sum is σ = 375813031341. Its totient is φ = 108183677760.

The previous prime is 202864664017. The next prime is 202864664029. The reversal of 202864664025 is 520466468202.

The square root of 202864664025 is 450405.

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 61581896649 + 141282767376 = 248157^2 + 375876^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 202864664025 - 2³ = 202864664017 is a prime.

It is a super-2 number, since 2×202864664025² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (202864664029) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 20263221 + ... + 20273229.

Almost surely, 2^202864664025 is an apocalyptic number.

202864664025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

202864664025 is the 450405-th square number.

202864664025 is the 225203-rd centered octagonal number.

It is an amenable number.

202864664025 is a deficient number, since it is larger than the sum of its proper divisors (172948367316).

202864664025 is an frugal number, since it uses more digits than its factorization.

202864664025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20040 (or 10017 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

The spelling of 202864664025 in words is "two hundred two billion, eight hundred sixty-four million, six hundred sixty-four thousand, twenty-five".