1161680978 has 8 divisors (see below), whose sum is σ = 1746547068. Its totient is φ = 579498624.

The previous prime is 1161680969. The next prime is 1161681023. The reversal of 1161680978 is 8790861611.

It can be written as a sum of positive squares in 2 ways, for example, as 922762129 + 238918849 = 30377^2 + 15457^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669851 + ... + 671582.

Almost surely, 2^1161680978 is an apocalyptic number.

1161680978 is a deficient number, since it is larger than the sum of its proper divisors (584866090).

1161680978 is a wasteful number, since it uses less digits than its factorization.

1161680978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341868.

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 1161680978 is about 34083.4414048816. The cubic root of 1161680978 is about 1051.2248677895.

The spelling of 1161680978 in words is "one billion, one hundred sixty-one million, six hundred eighty thousand, nine hundred seventy-eight".