961630649 has 8 divisors (see below), whose sum is σ = 1102003968. Its totient is φ = 822006720.

The previous prime is 961630643. The next prime is 961630697. The reversal of 961630649 is 946036169.

961630649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 961630649 - 2¹⁶ = 961565113 is a prime.

It is a super-2 number, since 2×961630649² = 1849467010192322402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961630643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184592 + ... + 189729.

It is an arithmetic number, because the mean of its divisors is an integer number (137750496).

Almost surely, 2^961630649 is an apocalyptic number.

It is an amenable number.

961630649 is a deficient number, since it is larger than the sum of its proper divisors (140373319).

961630649 is a wasteful number, since it uses less digits than its factorization.

961630649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374695.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 961630649 is about 31010.1700898270. The cubic root of 961630649 is about 987.0430590962.

The spelling of 961630649 in words is "nine hundred sixty-one million, six hundred thirty thousand, six hundred forty-nine".