1649600961 has 8 divisors (see below), whose sum is σ = 2207832000. Its totient is φ = 1095551952.

The previous prime is 1649600941. The next prime is 1649600969. The reversal of 1649600961 is 1690069461.

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

It is not a de Polignac number, because 1649600961 - 2⁷ = 1649600833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1649600969) 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, 1044586 + ... + 1046163.

It is an arithmetic number, because the mean of its divisors is an integer number (275979000).

Almost surely, 2^1649600961 is an apocalyptic number.

It is an amenable number.

1649600961 is a deficient number, since it is larger than the sum of its proper divisors (558231039).

1649600961 is a wasteful number, since it uses less digits than its factorization.

1649600961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091015.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 1649600961 is about 40615.2798956255. The cubic root of 1649600961 is about 1181.5704840561.

It can be divided in two parts, 1649600 and 961, that added together give a palindrome (1650561).

The spelling of 1649600961 in words is "one billion, six hundred forty-nine million, six hundred thousand, nine hundred sixty-one".