1273535220672 has 896 divisors, whose sum is σ = 4571379671040. Its totient is φ = 342749491200.

The previous prime is 1273535220623. The next prime is 1273535220697. The reversal of 1273535220672 is 2760225353721.

It is a happy number.

1273535220672 is a `hidden beast` number, since 1 + 2 + 7 + 3 + 53 + 522 + 0 + 6 + 72 = 666.

It is a super-2 number, since 2×1273535220672² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7361475178 + ... + 7361475350.

It is an arithmetic number, because the mean of its divisors is an integer number (5101986240).

Almost surely, 2^{1273535220672} is an apocalyptic number.

1273535220672 is a gapful number since it is divisible by the number (12) 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 1273535220672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2285689835520).

1273535220672 is an abundant number, since it is smaller than the sum of its proper divisors (3297844450368).

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

1273535220672 is a wasteful number, since it uses less digits than its factorization.

1273535220672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 45.

The spelling of 1273535220672 in words is "one trillion, two hundred seventy-three billion, five hundred thirty-five million, two hundred twenty thousand, six hundred seventy-two".