1630854641 has 8 divisors (see below), whose sum is σ = 1757962920. Its totient is φ = 1503983232.

The previous prime is 1630854623. The next prime is 1630854671. The reversal of 1630854641 is 1464580361.

It can be written as a sum of positive squares in 4 ways, for example, as 21160000 + 1609694641 = 4600^2 + 40121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1630854641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1630854595 and 1630854604.

It is not an unprimeable number, because it can be changed into a prime (1630854611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44780 + ... + 72573.

It is an arithmetic number, because the mean of its divisors is an integer number (219745365).

Almost surely, 2^1630854641 is an apocalyptic number.

It is an amenable number.

1630854641 is a deficient number, since it is larger than the sum of its proper divisors (127108279).

1630854641 is a wasteful number, since it uses less digits than its factorization.

1630854641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118435.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 1630854641 is about 40383.8413353658. The cubic root of 1630854641 is about 1177.0775716460.

The spelling of 1630854641 in words is "one billion, six hundred thirty million, eight hundred fifty-four thousand, six hundred forty-one".