1634606625 has 16 divisors (see below), whose sum is σ = 2719986048. Its totient is φ = 871790000.

The previous prime is 1634606621. The next prime is 1634606629. The reversal of 1634606625 is 5266064361.

It is an interprime number because it is at equal distance from previous prime (1634606621) and next prime (1634606629).

It is not a de Polignac number, because 1634606625 - 2² = 1634606621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1634606621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2179101 + ... + 2179850.

It is an arithmetic number, because the mean of its divisors is an integer number (169999128).

Almost surely, 2^1634606625 is an apocalyptic number.

1634606625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1634606625 is a deficient number, since it is larger than the sum of its proper divisors (1085379423).

1634606625 is an equidigital number, since it uses as much as digits as its factorization.

1634606625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4358969 (or 4358959 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 1634606625 is about 40430.2686733591. The cubic root of 1634606625 is about 1177.9795514258.

The spelling of 1634606625 in words is "one billion, six hundred thirty-four million, six hundred six thousand, six hundred twenty-five".