1265987151180 has 288 divisors, whose sum is σ = 3912367979520. Its totient is φ = 331324784640.

The previous prime is 1265987151133. The next prime is 1265987151197. The reversal of 1265987151180 is 811517895621.

1265987151180 is a `hidden beast` number, since 1 + 2 + 6 + 59 + 8 + 71 + 511 + 8 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1097993484 + ... + 1097994636.

It is an arithmetic number, because the mean of its divisors is an integer number (13584611040).

Almost surely, 2^{1265987151180} is an apocalyptic number.

1265987151180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1265987151180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1956183989760).

1265987151180 is an abundant number, since it is smaller than the sum of its proper divisors (2646380828340).

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

1265987151180 is a wasteful number, since it uses less digits than its factorization.

1265987151180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761 (or 1756 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 54.

The spelling of 1265987151180 in words is "one trillion, two hundred sixty-five billion, nine hundred eighty-seven million, one hundred fifty-one thousand, one hundred eighty".