196645725 has 90 divisors (see below), whose sum is σ = 385865370. Its totient is φ = 98988480.

The previous prime is 196645711. The next prime is 196645739. The reversal of 196645725 is 527546691.

196645725 is a `hidden beast` number, since 19 + 6 + 64 + 572 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (196645711) and next prime (196645739).

It can be written as a sum of positive squares in 3 ways, for example, as 29241 + 196616484 = 171^2 + 14022^2 .

It is not a de Polignac number, because 196645725 - 2⁶ = 196645661 is a prime.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 730891 + ... + 731159.

It is an arithmetic number, because the mean of its divisors is an integer number (4287393).

Almost surely, 2^196645725 is an apocalyptic number.

196645725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

196645725 is a deficient number, since it is larger than the sum of its proper divisors (189219645).

196645725 is a wasteful number, since it uses less digits than its factorization.

196645725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 296 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 196645725 is about 14023.0426441625. The cubic root of 196645725 is about 581.5157785574.

The spelling of 196645725 in words is "one hundred ninety-six million, six hundred forty-five thousand, seven hundred twenty-five".