1630121730 has 16 divisors (see below), whose sum is σ = 3912292224. Its totient is φ = 434699120.

The previous prime is 1630121707. The next prime is 1630121741. The reversal of 1630121730 is 371210361.

It is a self number, because there is not a number n which added to its sum of digits gives 1630121730.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27168666 + ... + 27168725.

It is an arithmetic number, because the mean of its divisors is an integer number (244518264).

Almost surely, 2^1630121730 is an apocalyptic number.

1630121730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1630121730 is an abundant number, since it is smaller than the sum of its proper divisors (2282170494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1630121730 is a wasteful number, since it uses less digits than its factorization.

1630121730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54337401.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 1630121730 is about 40374.7660055139. The cubic root of 1630121730 is about 1176.9012178204.

The spelling of 1630121730 in words is "one billion, six hundred thirty million, one hundred twenty-one thousand, seven hundred thirty".