1158061644 has 24 divisors (see below), whose sum is σ = 3002382320. Its totient is φ = 386020512.

The previous prime is 1158061633. The next prime is 1158061693. The reversal of 1158061644 is 4461608511.

1158061644 is a `hidden beast` number, since 1 + 1 + 5 + 8 + 0 + 6 + 1 + 644 = 666.

It is a super-3 number, since 3×1158061644³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1158061599 and 1158061608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5361289 + ... + 5361504.

Almost surely, 2^1158061644 is an apocalyptic number.

It is an amenable number.

1158061644 is an abundant number, since it is smaller than the sum of its proper divisors (1844320676).

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

1158061644 is a wasteful number, since it uses less digits than its factorization.

1158061644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10722806 (or 10722798 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 1158061644 is about 34030.3047885264. The cubic root of 1158061644 is about 1050.1319997316.

The spelling of 1158061644 in words is "one billion, one hundred fifty-eight million, sixty-one thousand, six hundred forty-four".