130723611540 has 72 divisors (see below), whose sum is σ = 370719064800. Its totient is φ = 34418270016.

The previous prime is 130723611449. The next prime is 130723611559. The reversal of 130723611540 is 45116327031.

It is a super-2 number, since 2×130723611540² (a number of 23 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 23 ways as a sum of consecutive naturals, for example, 199911 + ... + 549009.

It is an arithmetic number, because the mean of its divisors is an integer number (5148875900).

Almost surely, 2^130723611540 is an apocalyptic number.

130723611540 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 130723611540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185359532400).

130723611540 is an abundant number, since it is smaller than the sum of its proper divisors (239995453260).

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

130723611540 is a wasteful number, since it uses less digits than its factorization.

130723611540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349269 (or 349188 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

Adding to 130723611540 its reverse (45116327031), we get a palindrome (175839938571).

The spelling of 130723611540 in words is "one hundred thirty billion, seven hundred twenty-three million, six hundred eleven thousand, five hundred forty".