1078172761530 has 128 divisors (see below), whose sum is σ = 2652449587200. Its totient is φ = 280356460544.

The previous prime is 1078172761513. The next prime is 1078172761621. The reversal of 1078172761530 is 351672718701.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1078172761530.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 570762826 + ... + 570764714.

It is an arithmetic number, because the mean of its divisors is an integer number (20722262400).

Almost surely, 2^{1078172761530} is an apocalyptic number.

1078172761530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1078172761530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1326224793600).

1078172761530 is an abundant number, since it is smaller than the sum of its proper divisors (1574276825670).

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

1078172761530 is a wasteful number, since it uses less digits than its factorization.

1078172761530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3228.

The product of its (nonzero) digits is 493920, while the sum is 48.

The spelling of 1078172761530 in words is "one trillion, seventy-eight billion, one hundred seventy-two million, seven hundred sixty-one thousand, five hundred thirty".