1165115716278 has 16 divisors (see below), whose sum is σ = 2330242008816. Its totient is φ = 388370142720.

The previous prime is 1165115716273. The next prime is 1165115716291. The reversal of 1165115716278 is 8726175115611.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1165115716278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165115716273) 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, 2402898 + ... + 2846778.

It is an arithmetic number, because the mean of its divisors is an integer number (145640125551).

Almost surely, 2^{1165115716278} is an apocalyptic number.

1165115716278 is an abundant number, since it is smaller than the sum of its proper divisors (1165126292538).

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

1165115716278 is a wasteful number, since it uses less digits than its factorization.

1165115716278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881359.

The product of its digits is 705600, while the sum is 51.

The spelling of 1165115716278 in words is "one trillion, one hundred sixty-five billion, one hundred fifteen million, seven hundred sixteen thousand, two hundred seventy-eight".