1178215409644 has 24 divisors (see below), whose sum is σ = 2537694729248. Its totient is φ = 466107194880.

The previous prime is 1178215409537. The next prime is 1178215409647. The reversal of 1178215409644 is 4469045128711.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 1178215409591 and 1178215409600.

It is not an unprimeable number, because it can be changed into a prime (1178215409647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1618427397 + ... + 1618428124.

Almost surely, 2^{1178215409644} is an apocalyptic number.

1178215409644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1178215409644 is an abundant number, since it is smaller than the sum of its proper divisors (1359479319604).

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

1178215409644 is a wasteful number, since it uses less digits than its factorization.

1178215409644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3236855545 (or 3236855543 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 1178215409644 in words is "one trillion, one hundred seventy-eight billion, two hundred fifteen million, four hundred nine thousand, six hundred forty-four".