1161681728816 has 60 divisors (see below), whose sum is σ = 2673936187488. Its totient is φ = 487270740096.

The previous prime is 1161681728783. The next prime is 1161681728843. The reversal of 1161681728816 is 6188271861611.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15726311 + ... + 15800006.

Almost surely, 2^{1161681728816} is an apocalyptic number.

1161681728816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1161681728816 is an abundant number, since it is smaller than the sum of its proper divisors (1512254458672).

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

1161681728816 is a wasteful number, since it uses less digits than its factorization.

1161681728816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31526386 (or 31526373 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 56.

The spelling of 1161681728816 in words is "one trillion, one hundred sixty-one billion, six hundred eighty-one million, seven hundred twenty-eight thousand, eight hundred sixteen".