1273495487180 has 144 divisors (see below), whose sum is σ = 3156523090560. Its totient is φ = 430244462592.

The previous prime is 1273495487179. The next prime is 1273495487189. The reversal of 1273495487180 is 817845943721.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1273495487189) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82477901 + ... + 82493339.

It is an arithmetic number, because the mean of its divisors is an integer number (21920299240).

Almost surely, 2^{1273495487180} is an apocalyptic number.

1273495487180 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 1273495487180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1578261545280).

1273495487180 is an abundant number, since it is smaller than the sum of its proper divisors (1883027603380).

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

1273495487180 is a wasteful number, since it uses less digits than its factorization.

1273495487180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16688 (or 16679 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 59.

The spelling of 1273495487180 in words is "one trillion, two hundred seventy-three billion, four hundred ninety-five million, four hundred eighty-seven thousand, one hundred eighty".