163745025 has 24 divisors (see below), whose sum is σ = 271217760. Its totient is φ = 87171840.

The previous prime is 163745009. The next prime is 163745041. The reversal of 163745025 is 520547361.

It is an interprime number because it is at equal distance from previous prime (163745009) and next prime (163745041).

It is not a de Polignac number, because 163745025 - 2⁴ = 163745009 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47769 + ... + 51081.

It is an arithmetic number, because the mean of its divisors is an integer number (11300740).

Almost surely, 2^163745025 is an apocalyptic number.

163745025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163745025 is a deficient number, since it is larger than the sum of its proper divisors (107472735).

163745025 is a wasteful number, since it uses less digits than its factorization.

163745025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3985 (or 3980 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 163745025 is about 12796.2895012578. The cubic root of 163745025 is about 547.0865501002.

The spelling of 163745025 in words is "one hundred sixty-three million, seven hundred forty-five thousand, twenty-five".