1630516381 has 8 divisors (see below), whose sum is σ = 1756503000. Its totient is φ = 1504610112.

The previous prime is 1630516379. The next prime is 1630516399. The reversal of 1630516381 is 1836150361.

It can be written as a sum of positive squares in 4 ways, for example, as 101002500 + 1529513881 = 10050^2 + 39109^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1630516381 - 2¹ = 1630516379 is a prime.

It is a super-2 number, since 2×1630516381² = 5317167337418674322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630516301) 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, 25995 + ... + 62743.

It is an arithmetic number, because the mean of its divisors is an integer number (219562875).

Almost surely, 2^1630516381 is an apocalyptic number.

It is an amenable number.

1630516381 is a deficient number, since it is larger than the sum of its proper divisors (125986619).

1630516381 is a wasteful number, since it uses less digits than its factorization.

1630516381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40175.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1630516381 is about 40379.6530569543. The cubic root of 1630516381 is about 1176.9961857312.

The spelling of 1630516381 in words is "one billion, six hundred thirty million, five hundred sixteen thousand, three hundred eighty-one".