1961273360 has 40 divisors (see below), whose sum is σ = 4562088216. Its totient is φ = 784143360.

The previous prime is 1961273291. The next prime is 1961273371. The reversal of 1961273360 is 633721691.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1263376 + 1960009984 = 1124^2 + 44272^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 224270 + ... + 232850.

Almost surely, 2^1961273360 is an apocalyptic number.

1961273360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1961273360 is an abundant number, since it is smaller than the sum of its proper divisors (2600814856).

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

1961273360 is a wasteful number, since it uses less digits than its factorization.

1961273360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11451 (or 11445 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 1961273360 is about 44286.2660426458. The cubic root of 1961273360 is about 1251.7359049912.

The spelling of 1961273360 in words is "one billion, nine hundred sixty-one million, two hundred seventy-three thousand, three hundred sixty".