1145614871556 has 81 divisors (see below), whose sum is σ = 3007541459559. Its totient is φ = 381813825816.

The previous prime is 1145614871501. The next prime is 1145614871561. The reversal of 1145614871556 is 6551784165411.

The square root of 1145614871556 is 1070334.

It is a perfect power (a square), and thus also a powerful number.

1145614871556 is a `hidden beast` number, since 1 + 1 + 4 + 5 + 6 + 1 + 4 + 87 + 1 + 556 = 666.

It is a tau number, because it is divible by the number of its divisors (81).

It is a super-2 number, since 2×1145614871556² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 173390805 + ... + 173397411.

Almost surely, 2^{1145614871556} is an apocalyptic number.

1145614871556 is the 1070334-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1145614871556

1145614871556 is an abundant number, since it is smaller than the sum of its proper divisors (1861926588003).

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

1145614871556 is an frugal number, since it uses more digits than its factorization.

1145614871556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13242 (or 6612 counting only the distinct ones).

The product of its digits is 4032000, while the sum is 54.

The spelling of 1145614871556 in words is "one trillion, one hundred forty-five billion, six hundred fourteen million, eight hundred seventy-one thousand, five hundred fifty-six".