1630750161 has 4 divisors (see below), whose sum is σ = 2174333552. Its totient is φ = 1087166772.

The previous prime is 1630750123. The next prime is 1630750171. The reversal of 1630750161 is 1610570361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1630750161 - 2⁶ = 1630750097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1630750111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271791691 + ... + 271791696.

It is an arithmetic number, because the mean of its divisors is an integer number (543583388).

Almost surely, 2^1630750161 is an apocalyptic number.

It is an amenable number.

1630750161 is a deficient number, since it is larger than the sum of its proper divisors (543583391).

1630750161 is an equidigital number, since it uses as much as digits as its factorization.

1630750161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543583390.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 1630750161 is about 40382.5477279480. The cubic root of 1630750161 is about 1177.0524347867.

The spelling of 1630750161 in words is "one billion, six hundred thirty million, seven hundred fifty thousand, one hundred sixty-one".