1961284672 has 14 divisors (see below), whose sum is σ = 3891924398. Its totient is φ = 980642304.

The previous prime is 1961284639. The next prime is 1961284711. The reversal of 1961284672 is 2764821691.

It can be written as a sum of positive squares in only one way, i.e., 1955054656 + 6230016 = 44216^2 + 2496^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15322473 + ... + 15322600.

Almost surely, 2^1961284672 is an apocalyptic number.

It is an amenable number.

1961284672 is a deficient number, since it is larger than the sum of its proper divisors (1930639726).

1961284672 is an equidigital number, since it uses as much as digits as its factorization.

1961284672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30645085 (or 30645075 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 1961284672 is about 44286.3937569995. The cubic root of 1961284672 is about 1251.7383115245.

The spelling of 1961284672 in words is "one billion, nine hundred sixty-one million, two hundred eighty-four thousand, six hundred seventy-two".