1630640770 has 24 divisors (see below), whose sum is σ = 3226245372. Its totient is φ = 592959840.

The previous prime is 1630640749. The next prime is 1630640777. The reversal of 1630640770 is 770460361.

It can be written as a sum of positive squares in 2 ways, for example, as 1518894729 + 111746041 = 38973^2 + 10571^2 .

It is not an unprimeable number, because it can be changed into a prime (1630640777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 672609 + ... + 675028.

Almost surely, 2^1630640770 is an apocalyptic number.

1630640770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1630640770 is a deficient number, since it is larger than the sum of its proper divisors (1595604602).

1630640770 is a wasteful number, since it uses less digits than its factorization.

1630640770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347666 (or 1347655 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 1630640770 is about 40381.1932711256. The cubic root of 1630640770 is about 1177.0261152385.

The spelling of 1630640770 in words is "one billion, six hundred thirty million, six hundred forty thousand, seven hundred seventy".