1178072135540 has 24 divisors (see below), whose sum is σ = 2486904118272. Its totient is φ = 468761685920.

The previous prime is 1178072135509. The next prime is 1178072135563. The reversal of 1178072135540 is 455312708711.

It is a super-2 number, since 2×1178072135540² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1178072135491 and 1178072135500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154194104 + ... + 154201743.

It is an arithmetic number, because the mean of its divisors is an integer number (103621004928).

Almost surely, 2^{1178072135540} is an apocalyptic number.

1178072135540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1178072135540 is an abundant number, since it is smaller than the sum of its proper divisors (1308831982732).

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

1178072135540 is a wasteful number, since it uses less digits than its factorization.

1178072135540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308396047 (or 308396045 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 44.

The spelling of 1178072135540 in words is "one trillion, one hundred seventy-eight billion, seventy-two million, one hundred thirty-five thousand, five hundred forty".